September 11 attacks

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This article is about the September 2001 attacks. September 11 attacks_sentence_0

"9/11" redirects here. September 11 attacks_sentence_1

For other uses, see September 11 attacks (disambiguation) and 9/11 (disambiguation). September 11 attacks_sentence_2

September 11 attacks_table_infobox_0

September 11 attacksSeptember 11 attacks_header_cell_0_0_0
LocationSeptember 11 attacks_header_cell_0_1_0 September 11 attacks_cell_0_1_1
DateSeptember 11 attacks_header_cell_0_2_0 September 11, 2001; 19 years ago (2001-09-11)

8:46 – 10:28 a.m. (EDT)September 11 attacks_cell_0_2_1

TargetSeptember 11 attacks_header_cell_0_3_0 September 11 attacks_cell_0_3_1
Attack typeSeptember 11 attacks_header_cell_0_4_0 September 11 attacks_cell_0_4_1
DeathsSeptember 11 attacks_header_cell_0_5_0 2,996 

(2,977 victims + 19 Al-Qaeda terrorists)September 11 attacks_cell_0_5_1

InjuredSeptember 11 attacks_header_cell_0_6_0 25,000September 11 attacks_cell_0_6_1
PerpetratorsSeptember 11 attacks_header_cell_0_7_0 Al-Qaeda

(see also responsibility and hijackers)September 11 attacks_cell_0_7_1

No. of participantsSeptember 11 attacks_header_cell_0_8_0 19September 11 attacks_cell_0_8_1

The September 11 attacks, often referred to as 9/11, were a series of four coordinated terrorist attacks by the Wahhabi terrorist group Al-Qaeda against the United States on the morning of Tuesday, September 11, 2001. September 11 attacks_sentence_3

The attacks resulted in 2,977 fatalities, over 25,000 injuries, and substantial long-term health consequences, in addition to at least $10 billion in infrastructure and property damage. September 11 attacks_sentence_4

It is the single deadliest terrorist attack in human history and the single deadliest incident for firefighters and law enforcement officers in the history of the United States, with 343 and 72 killed, respectively. September 11 attacks_sentence_5

Four passenger airliners which had departed from airports in the northeastern United States bound for California were hijacked by 19 al-Qaeda terrorists. September 11 attacks_sentence_6

Two of the planes, American Airlines Flight 11 and United Airlines Flight 175, crashed into the North and South towers, respectively, of the World Trade Center complex in Lower Manhattan. September 11 attacks_sentence_7

Within an hour and 42 minutes, both 110-story towers collapsed. September 11 attacks_sentence_8

Debris and the resulting fires caused a partial or complete collapse of all other buildings in the World Trade Center complex, including the 47-story 7 World Trade Center tower, as well as significant damage to ten other large surrounding structures. September 11 attacks_sentence_9

A third plane, American Airlines Flight 77, was crashed into the Pentagon (the headquarters of the U.S. September 11 attacks_sentence_10 Department of Defense) in Arlington County, Virginia, which led to a partial collapse of the building's west side. September 11 attacks_sentence_11

The fourth plane, United Airlines Flight 93, was initially flown toward Washington, D.C., but crashed into a field in Stonycreek Township, Pennsylvania, after passengers thwarted the hijackers. September 11 attacks_sentence_12

Suspicion quickly fell onto al-Qaeda. September 11 attacks_sentence_13

The United States responded by launching the War on Terror and invading Afghanistan to depose the Taliban, which had failed to comply with U.S. demands to expel al-Qaeda from Afghanistan and extradite their leader Osama bin Laden. September 11 attacks_sentence_14

Many countries strengthened their anti-terrorism legislation and expanded the powers of law enforcement and intelligence agencies to prevent terrorist attacks. September 11 attacks_sentence_15

Although bin Laden initially denied any involvement, in 2004 he claimed responsibility for the attacks. September 11 attacks_sentence_16

Al-Qaeda and bin Laden cited U.S. September 11 attacks_sentence_17 support of Israel, the presence of U.S. September 11 attacks_sentence_18 troops in Saudi Arabia, and sanctions against Iraq as motives. September 11 attacks_sentence_19

After evading capture for almost a decade, bin Laden was located in Pakistan in 2011 and killed during a U.S. military raid. September 11 attacks_sentence_20

The destruction of the World Trade Center and nearby infrastructure seriously harmed the economy of New York City and had a significant effect on global markets. September 11 attacks_sentence_21

The U.S. and Canadian civilian airspaces were closed until September 13, while Wall Street was closed until September 17. September 11 attacks_sentence_22

Many closings, evacuations, and cancellations followed, out of respect or fear of further attacks. September 11 attacks_sentence_23

Cleanup of the World Trade Center site was completed in May 2002, and the Pentagon was repaired within a year. September 11 attacks_sentence_24

The construction of One World Trade Center began in November 2006, and the building opened in November 2014. September 11 attacks_sentence_25

Numerous memorials have been constructed, including the National September 11 Memorial & Museum in New York City, the Pentagon Memorial in Arlington County, Virginia, and the Flight 93 National Memorial at the Pennsylvania crash site. September 11 attacks_sentence_26

Background September 11 attacks_section_0

Further information: Timeline of the September 11 attacks and Responsibility for the September 11 attacks September 11 attacks_sentence_27

Al-Qaeda September 11 attacks_section_1

Further information: Al-Qaeda, Jihad, and Wahhabism September 11 attacks_sentence_28

The origins of al-Qaeda can be traced to 1979 when the Soviet Union invaded Afghanistan. September 11 attacks_sentence_29

Osama bin Laden travelled to Afghanistan and helped to organize Arab mujahideen to resist the Soviets. September 11 attacks_sentence_30

Under the guidance of Ayman al-Zawahiri, bin Laden became more radical. September 11 attacks_sentence_31

In 1996, bin Laden issued his first fatwā, calling for American soldiers to leave Saudi Arabia. September 11 attacks_sentence_32

In a second fatwā in 1998, bin Laden outlined his objections to American foreign policy with respect to Israel, as well as the continued presence of American troops in Saudi Arabia after the Gulf War. September 11 attacks_sentence_33

Bin Laden used Islamic texts to exhort Muslims to attack Americans until the stated grievances were reversed. September 11 attacks_sentence_34

Muslim legal scholars "have throughout Islamic history unanimously agreed that the jihad is an individual duty if the enemy destroys the Muslim countries", according to bin Laden. September 11 attacks_sentence_35

Osama bin Laden September 11 attacks_section_2

Further information: Osama bin Laden, Videos and audio recordings of Osama bin Laden, and Death of Osama bin Laden September 11 attacks_sentence_36

Bin Laden orchestrated the attacks and initially denied involvement but later recanted his false statements. September 11 attacks_sentence_37

Al Jazeera broadcast a statement by bin Laden on September 16, 2001, stating, "I stress that I have not carried out this act, which appears to have been carried out by individuals with their own motivation." September 11 attacks_sentence_38

In November 2001, U.S. forces recovered a videotape from a destroyed house in Jalalabad, Afghanistan. September 11 attacks_sentence_39

In the video, bin Laden is seen talking to Khaled al-Harbi and admits foreknowledge of the attacks. September 11 attacks_sentence_40

On December 27, 2001, a second bin Laden video was released. September 11 attacks_sentence_41

In the video, he said: September 11 attacks_sentence_42

but he stopped short of admitting responsibility for the attacks. September 11 attacks_sentence_43

Shortly before the U.S. September 11 attacks_sentence_44 presidential election in 2004, bin Laden used a taped statement to publicly acknowledge al-Qaeda's involvement in the attacks on the United States. September 11 attacks_sentence_45

He admitted his direct link to the attacks and said they were carried out because: September 11 attacks_sentence_46

Bin Laden said he had personally directed his followers to attack the World Trade Center and the Pentagon. September 11 attacks_sentence_47

Another video obtained by Al Jazeera in September 2006 shows bin Laden with Ramzi bin al-Shibh, as well as two hijackers, Hamza al-Ghamdi and Wail al-Shehri, as they make preparations for the attacks. September 11 attacks_sentence_48

The U.S. never formally indicted bin Laden for the 9/11 attacks, but he was on the FBI's Most Wanted List for the bombings of the U.S. Embassies in Dar es Salaam, Tanzania, and Nairobi, Kenya. September 11 attacks_sentence_49

After a 10-year manhunt, U.S. President Barack Obama announced that bin Laden was killed by American special forces in his compound in Abbottabad, Pakistan, on May 1, 2011. September 11 attacks_sentence_50

Khalid Sheikh Mohammed September 11 attacks_section_3

Main article: Khalid Sheikh Mohammed September 11 attacks_sentence_51

Journalist Yosri Fouda of the Arabic television channel Al Jazeera reported that in April 2002, Khalid Sheikh Mohammed admitted his involvement in the attacks, along with Ramzi bin al-Shibh. September 11 attacks_sentence_52

The 2004 9/11 Commission Report determined that the animosity towards the United States felt by Mohammed, the principal architect of the 9/11 attacks, stemmed from his "violent disagreement with U.S. foreign policy favoring Israel". September 11 attacks_sentence_53

Mohammed was also an adviser and financier of the 1993 World Trade Center bombing and the uncle of Ramzi Yousef, the lead bomber in that attack. September 11 attacks_sentence_54

Mohammed was arrested on March 1, 2003, in Rawalpindi, Pakistan, by Pakistani security officials working with the CIA. September 11 attacks_sentence_55

He was then held at multiple CIA secret prisons and Guantanamo Bay where he was interrogated and tortured with methods including waterboarding. September 11 attacks_sentence_56

During U.S. hearings at Guantanamo Bay in March 2007, Mohammed again confessed his responsibility for the attacks, stating he "was responsible for the 9/11 operation from A to Z" and that his statement was not made under duress. September 11 attacks_sentence_57

A letter presented by the lawyers of Khaled Sheikh Mohammed in the U.S. District Court, Manhattan on July 26, 2019 indicated that he was interested in testifying about Saudi Arabia’s role in the 9/11 attacks and helping the victims and families of the victims of 9/11 in exchange for the United States not seeking the death penalty against him. September 11 attacks_sentence_58

James Kreindler, one of the lawyers for the victims, raised question over the usefulness of Mohammed. September 11 attacks_sentence_59

Other al-Qaeda members September 11 attacks_section_4

Further information: Trials related to the September 11 attacks September 11 attacks_sentence_60

In "Substitution for Testimony of Khalid Sheikh Mohammed" from the trial of Zacarias Moussaoui, five people are identified as having been completely aware of the operation's details. September 11 attacks_sentence_61

They are bin Laden, Khalid Sheikh Mohammed, Ramzi bin al-Shibh, Abu Turab al-Urduni, and Mohammed Atef. September 11 attacks_sentence_62

To date, only peripheral figures have been tried or convicted for the attacks. September 11 attacks_sentence_63

On September 26, 2005, the Spanish high court sentenced Abu Dahdah to 27 years in prison for conspiracy on the 9/11 attacks and being a member of the terrorist organization al-Qaeda. September 11 attacks_sentence_64

At the same time, another 17 al-Qaeda members were sentenced to penalties of between six and eleven years. September 11 attacks_sentence_65

On February 16, 2006, the Spanish Supreme Court reduced the Abu Dahdah penalty to 12 years because it considered that his participation in the conspiracy was not proven. September 11 attacks_sentence_66

Also in 2006, Moussaoui—who some originally suspected might have been the assigned 20th hijacker—was convicted for the lesser role of conspiracy to commit acts of terrorism and air piracy. September 11 attacks_sentence_67

He was sentenced to life in prison without parole in the United States. September 11 attacks_sentence_68

Mounir el-Motassadeq, an associate of the Hamburg-based hijackers, served 15 years in Germany for his role in helping the hijackers prepare for the attacks. September 11 attacks_sentence_69

He was released in October 2018, and deported to Morocco. September 11 attacks_sentence_70

The Hamburg cell in Germany included radical Islamists who eventually came to be key operatives in the 9/11 attacks. September 11 attacks_sentence_71

Mohamed Atta, Marwan al-Shehhi, Ziad Jarrah, Ramzi bin al-Shibh, and Said Bahaji were all members of al-Qaeda's Hamburg cell. September 11 attacks_sentence_72

Motives September 11 attacks_section_5

Main article: Motives for the September 11 attacks September 11 attacks_sentence_73

Osama bin Laden's declaration of a holy war against the United States, and a 1998 fatwā signed by bin Laden and others, calling for the killing of Americans, are seen by investigators as evidence of his motivation. September 11 attacks_sentence_74

In bin Laden's November 2002 "Letter to America", he explicitly stated that al-Qaeda's motives for their attacks include: September 11 attacks_sentence_75

September 11 attacks_unordered_list_0

  • U.S. support of IsraelSeptember 11 attacks_item_0_0
  • support for the "attacks against Muslims" in SomaliaSeptember 11 attacks_item_0_1
  • support of Philippines against Muslims in the Moro conflictSeptember 11 attacks_item_0_2
  • support for Israeli "aggression" against Muslims in LebanonSeptember 11 attacks_item_0_3
  • support of Russian "atrocities against Muslims" in ChechnyaSeptember 11 attacks_item_0_4
  • pro-American governments in the Middle East (who "act as your agents") being against Muslim interestsSeptember 11 attacks_item_0_5
  • support of Indian "oppression against Muslims" in KashmirSeptember 11 attacks_item_0_6
  • the presence of U.S. troops in Saudi ArabiaSeptember 11 attacks_item_0_7
  • the sanctions against IraqSeptember 11 attacks_item_0_8

After the attacks, bin Laden and al-Zawahiri released additional videotapes and audio recordings, some of which repeated those reasons for the attacks. September 11 attacks_sentence_76

Two particularly important publications were bin Laden's 2002 "Letter to America", and a 2004 videotape by bin Laden. September 11 attacks_sentence_77

Bin Laden interpreted Muhammad as having banned the "permanent presence of infidels in Arabia". September 11 attacks_sentence_78

In 1996, bin Laden issued a fatwā calling for American troops to leave Saudi Arabia. September 11 attacks_sentence_79

In 1998, al-Qaeda wrote, "for over seven years the United States has been occupying the lands of Islam in the holiest of places, the Arabian Peninsula, plundering its riches, dictating to its rulers, humiliating its people, terrorizing its neighbors, and turning its bases in the Peninsula into a spearhead through which to fight the neighboring Muslim peoples." September 11 attacks_sentence_80

In a December 1999 interview, bin Laden said he felt that Americans were "too near to Mecca", and considered this a provocation to the entire Muslim world. September 11 attacks_sentence_81

One analysis of suicide terrorism suggested that without U.S. troops in Saudi Arabia, al-Qaeda likely would not have been able to get people to commit to suicide missions. September 11 attacks_sentence_82

In the 1998 fatwā, al-Qaeda identified the Iraq sanctions as a reason to kill Americans, condemning the "protracted blockade" among other actions that constitute a declaration of war against "Allah, his messenger, and Muslims." September 11 attacks_sentence_83

The fatwā declared that "the ruling to kill the Americans and their allies—civilians and military—is an individual duty for every Muslim who can do it in any country in which it is possible to do it, in order to liberate the al-Aqsa Mosque and the holy mosque of Mecca from their grip, and in order for their [the Americans'] armies to move out of all the lands of Islam, defeated and unable to threaten any Muslim." September 11 attacks_sentence_84

In 2004, Bin Laden claimed that the idea of destroying the towers had first occurred to him in 1982, when he witnessed Israel's bombardment of high-rise apartment buildings during the 1982 Lebanon War. September 11 attacks_sentence_85

Some analysts, including Mearsheimer and Walt, also claimed that U.S. support of Israel was one motive for the attacks. September 11 attacks_sentence_86

In 2004 and 2010, bin Laden again connected the September 11 attacks with U.S. support of Israel, although most of the letter expressed bin Laden's disdain for President Bush and bin Laden's hope to "destroy and bankrupt" the U.S. September 11 attacks_sentence_87

Other motives have been suggested in addition to those stated by bin Laden and al-Qaeda. September 11 attacks_sentence_88

Some authors suggested the "humiliation" that resulted from the Islamic world falling behind the Western world—this discrepancy was rendered especially visible by the globalization trend and a desire to provoke the U.S. into a broader war against the Islamic world in the hope of motivating more allies to support al-Qaeda. September 11 attacks_sentence_89

Similarly, others have argued that 9/11 was a strategic move with the objective of provoking America into a war that would incite a pan-Islamic revolution. September 11 attacks_sentence_90

Planning September 11 attacks_section_6

Main article: Planning of the September 11 attacks September 11 attacks_sentence_91

The attacks were conceived by Khalid Sheikh Mohammed, who first presented it to Osama bin Laden in 1996. September 11 attacks_sentence_92

At that time, bin Laden and al-Qaeda were in a period of transition, having just relocated back to Afghanistan from Sudan. September 11 attacks_sentence_93

The 1998 African Embassy bombings and bin Laden's February 1998 fatwā marked a turning point of al-Qaeda's terrorist operation, as bin Laden became intent on attacking the United States. September 11 attacks_sentence_94

In late 1998 or early 1999, bin Laden gave approval for Mohammed to go forward with organizing the plot. September 11 attacks_sentence_95

Mohammed, bin Laden, and bin Laden's deputy Mohammed Atef held a series of meetings in early 1999. September 11 attacks_sentence_96

Atef provided operational support, including target selections and helping arrange travel for the hijackers. September 11 attacks_sentence_97

Bin Laden overruled Mohammed, rejecting potential targets such as the U.S. Bank Tower in Los Angeles for lack of time. September 11 attacks_sentence_98

Bin Laden provided leadership and financial support, and was involved in selecting participants. September 11 attacks_sentence_99

He initially selected Nawaf al-Hazmi and Khalid al-Mihdhar, both experienced jihadists who had fought in Bosnia. September 11 attacks_sentence_100

Hazmi and Mihdhar arrived in the United States in mid-January 2000. September 11 attacks_sentence_101

In early 2000, Hazmi and Mihdhar took flying lessons in San Diego, California, but both spoke little English, performed poorly in flying lessons, and eventually served as secondary—or "muscle"—hijackers. September 11 attacks_sentence_102

In late 1999, a group of men from Hamburg, Germany arrived in Afghanistan; the group included Mohamed Atta, Marwan al-Shehhi, Ziad Jarrah, and Ramzi bin al-Shibh. September 11 attacks_sentence_103

Bin Laden selected these men because they were educated, could speak English, and had experience living in the West. September 11 attacks_sentence_104

New recruits were routinely screened for special skills and al-Qaeda leaders consequently discovered that Hani Hanjour already had a commercial pilot's license. September 11 attacks_sentence_105

Mohammed later said that he helped the hijackers blend in by teaching them how to order food in restaurants and dress in Western clothing. September 11 attacks_sentence_106

Hanjour arrived in San Diego on December 8, 2000, joining Hazmi. September 11 attacks_sentence_107

They soon left for Arizona, where Hanjour took refresher training. September 11 attacks_sentence_108

Marwan al-Shehhi arrived at the end of May 2000, while Atta arrived on June 3, 2000, and Jarrah arrived on June 27, 2000. September 11 attacks_sentence_109

Bin al-Shibh applied several times for a visa to the United States, but as a Yemeni, he was rejected out of concerns he would overstay his visa. September 11 attacks_sentence_110

Bin al-Shibh stayed in Hamburg, providing coordination between Atta and Mohammed. September 11 attacks_sentence_111

The three Hamburg cell members all took pilot training in South Florida at Huffman Aviation. September 11 attacks_sentence_112

In spring of 2001, the secondary hijackers began arriving in the United States. September 11 attacks_sentence_113

In July 2001, Atta met with bin al-Shibh in Spain, where they coordinated details of the plot, including final target selection. September 11 attacks_sentence_114

Bin al-Shibh also passed along bin Laden's wish for the attacks to be carried out as soon as possible. September 11 attacks_sentence_115

Some of the hijackers received passports from corrupt Saudi officials who were family members, or used fraudulent passports to gain entry. September 11 attacks_sentence_116

There is some idea that 9/11 was selected by the hijackers as the date of the attack because of its resemblance to 9-1-1, the phone number to report emergencies in the U.S. September 11 attacks_sentence_117

However, Lawrence Wright wrote that the hijackers chose it because September 11, 1683 is when the King of Poland began the battle that turned back the Muslim armies from the Ottoman Empire that were attempting to capture Vienna. September 11 attacks_sentence_118

For Osama bin Laden, this was a date when the West gained some dominance over Islam, and by attacking on this date, he hoped to make a step in Islam "winning" the war for worldwide power and influence. September 11 attacks_sentence_119

Prior intelligence September 11 attacks_section_7

Main article: September 11 intelligence before the attacks September 11 attacks_sentence_120

In late 1999, al-Qaeda associate Walid bin Attash ("Khallad") contacted Mihdhar, telling him to meet him in Kuala Lumpur, Malaysia; Hazmi and Abu Bara al Yemeni would also be in attendance. September 11 attacks_sentence_121

The NSA intercepted a telephone call mentioning the meeting, Mihdhar, and the name "Nawaf" (Hazmi). September 11 attacks_sentence_122

While the agency feared "Something nefarious might be afoot", it took no further action. September 11 attacks_sentence_123

The CIA had already been alerted by Saudi intelligence about the status of Mihdhar and Hazmi as al-Qaeda members, and a CIA team broke into Mihdhar's Dubai hotel room and discovered that Mihdhar had a U.S. visa. September 11 attacks_sentence_124

While Alec Station alerted intelligence agencies worldwide about this fact, it did not share this information with the FBI. September 11 attacks_sentence_125

The Malaysian Special Branch observed the January 5, 2000 meeting of the two al-Qaeda members, and informed the CIA that Mihdhar, Hazmi, and Khallad were flying to Bangkok, but the CIA never notified other agencies of this, nor did it ask the State Department to put Mihdhar on its watchlist. September 11 attacks_sentence_126

An FBI liaison to Alec Station asked permission to inform the FBI of the meeting but was told: "This is not a matter for the FBI." September 11 attacks_sentence_127

By late June, senior counter-terrorism official Richard Clarke and CIA director George Tenet were "convinced that a major series of attacks was about to come", although the CIA believed the attacks would likely occur in Saudi Arabia or Israel. September 11 attacks_sentence_128

In early July, Clarke put domestic agencies on "full alert", telling them, "Something really spectacular is going to happen here. September 11 attacks_sentence_129

soon." September 11 attacks_sentence_130

He asked the FBI and the State Department to alert the embassies and police departments, and the Defense Department to go to "Threat Condition Delta". September 11 attacks_sentence_131

Clarke would later write: "Somewhere in CIA there was information that two known al Qaeda terrorists had come into the United States. September 11 attacks_sentence_132

Somewhere in FBI there was information that strange things had been going on at flight schools in the United States. September 11 attacks_sentence_133

. September 11 attacks_sentence_134

. September 11 attacks_sentence_135

. September 11 attacks_sentence_136

They had specific information about individual terrorists from which one could have deduced what was about to happen. September 11 attacks_sentence_137

None of that information got to me or the White House." September 11 attacks_sentence_138

On July 13, Tom Wilshire, a CIA agent assigned to the FBI's international terrorism division, emailed his superiors at the CIA's Counterterrorism Center (CTC) requesting permission to inform the FBI that Hazmi was in the country and that Mihdhar had a U.S. visa. September 11 attacks_sentence_139

The CIA never responded. September 11 attacks_sentence_140

The same day in July, Margarette Gillespie, an FBI analyst working in the CTC, was told to review material about the Malaysia meeting. September 11 attacks_sentence_141

She was not told of the participants' presence in the U.S. September 11 attacks_sentence_142

The CIA gave Gillespie surveillance photos of Mihdhar and Hazmi from the meeting to show to FBI counterterrorism, but did not tell her their significance. September 11 attacks_sentence_143

The Intelink database informed her not to share intelligence material on the meeting to criminal investigators. September 11 attacks_sentence_144

When shown the photos, the FBI were refused more details on their significance, and they were not given Mihdhar's date of birth nor passport number. September 11 attacks_sentence_145

In late August 2001, Gillespie told the INS, the State Department, the Customs Service, and the FBI to put Hazmi and Mihdhar on their watchlists, but the FBI was prohibited from using criminal agents in the search for the duo, which hindered their efforts. September 11 attacks_sentence_146

Also in July, a Phoenix-based FBI agent sent a message to FBI headquarters, Alec Station, and to FBI agents in New York alerting them to "the possibility of a coordinated effort by Osama bin Laden to send students to the United States to attend civil aviation universities and colleges". September 11 attacks_sentence_147

The agent, Kenneth Williams, suggested the need to interview all flight school managers and identify all Arab students seeking flight training. September 11 attacks_sentence_148

In July, Jordan alerted the U.S. that al-Qaeda was planning an attack on the U.S.; "months later", Jordan notified the U.S. that the attack's codename was "The Big Wedding" and that it involved airplanes. September 11 attacks_sentence_149

On August 6, 2001, the CIA's Presidential Daily Brief ("PDB"), designated "For the President Only", was entitled "Bin Ladin Determined to Strike in U.S." The memo noted that FBI information "indicates patterns of suspicious activity in this country consistent with preparations for hijackings or other types of attacks". September 11 attacks_sentence_150

In mid-August, one Minnesota flight school alerted the FBI about Zacarias Moussaoui, who had asked "suspicious questions". September 11 attacks_sentence_151

The FBI found that Moussaoui was a radical who had traveled to Pakistan, and the INS arrested him for overstaying his French visa. September 11 attacks_sentence_152

Their request to search his laptop was denied by FBI headquarters due to the lack of probable cause. September 11 attacks_sentence_153

The failures in intelligence-sharing were attributed to 1995 Justice Department policies limiting intelligence sharing, combined with CIA and NSA reluctance to reveal "sensitive sources and methods" such as tapped phones. September 11 attacks_sentence_154

Testifying before the 9/11 Commission in April 2004, then-Attorney General John Ashcroft recalled that the "single greatest structural cause for the September 11th problem was the wall that segregated or separated criminal investigators and intelligence agents". September 11 attacks_sentence_155

Clarke also wrote: "There were failures in the organizations failures to get information to the right place at the right time." September 11 attacks_sentence_156

Attacks September 11 attacks_section_8

Further information: Timeline for the day of the September 11 attacks September 11 attacks_sentence_157

Early on the morning of September 11, 2001, 19 hijackers took control of four commercial airliners (two Boeing 757s and two Boeing 767s) en route to California (three headed to LAX in Los Angeles and one to SFO in San Francisco) after takeoffs from Logan International Airport in Boston, Massachusetts; Newark Liberty International Airport in Newark, New Jersey; and Washington Dulles International Airport in Loudoun and Fairfax counties in Virginia. September 11 attacks_sentence_158

Large planes with long flights were selected for hijacking because they would be full of fuel. September 11 attacks_sentence_159

The four flights were: September 11 attacks_sentence_160

September 11 attacks_unordered_list_1

  • American Airlines Flight 11: a Boeing 767 aircraft, departed Logan Airport at 7:59 a.m. en route to Los Angeles with a crew of 11 and 76 passengers, not including five hijackers. The hijackers flew the plane into the northern facade of the North Tower of the World Trade Center in New York City at 8:46 a.m.September 11 attacks_item_1_9
  • United Airlines Flight 175: a Boeing 767 aircraft, departed Logan Airport at 8:14 a.m. en route to Los Angeles with a crew of nine and 51 passengers, not including five hijackers. The hijackers flew the plane into the southern facade of the South Tower of the World Trade Center in New York City at 9:03 a.m.September 11 attacks_item_1_10
  • American Airlines Flight 77: a Boeing 757 aircraft, departed Washington Dulles International Airport at 8:20 a.m. en route to Los Angeles with a crew of six and 53 passengers, not including five hijackers. The hijackers flew the plane into the western facade of the Pentagon in Arlington County, Virginia, at 9:37 a.m.September 11 attacks_item_1_11
  • United Airlines Flight 93: a Boeing 757 aircraft, departed Newark International Airport at 8:42 a.m. en route to San Francisco, with a crew of seven and 33 passengers, not including four hijackers. As passengers attempted to subdue the hijackers, the aircraft crashed into a field in Stonycreek Township near Shanksville, Pennsylvania, at 10:03 a.m.September 11 attacks_item_1_12

Media coverage was extensive during the attacks and aftermath, beginning moments after the first crash into the World Trade Center. September 11 attacks_sentence_161

September 11 attacks_table_general_1

There were 0 Survivors (Including the Hijackers) from the following 4 FlightsSeptember 11 attacks_table_caption_1
AircraftSeptember 11 attacks_header_cell_1_0_0 Number of OccupantsSeptember 11 attacks_header_cell_1_0_3 TimeSeptember 11 attacks_header_cell_1_0_6 LocationSeptember 11 attacks_header_cell_1_0_8 CasualtiesSeptember 11 attacks_header_cell_1_0_11
OperatorSeptember 11 attacks_header_cell_1_1_0 Flight NumberSeptember 11 attacks_header_cell_1_1_1 Aircraft TypeSeptember 11 attacks_header_cell_1_1_2 CrewSeptember 11 attacks_header_cell_1_1_3 PassengersSeptember 11 attacks_header_cell_1_1_4 HijackersSeptember 11 attacks_header_cell_1_1_5 Time of DepartureSeptember 11 attacks_header_cell_1_1_6 Time of CrashSeptember 11 attacks_header_cell_1_1_7 Departed FromSeptember 11 attacks_header_cell_1_1_8 En Route ToSeptember 11 attacks_header_cell_1_1_9 Crash SiteSeptember 11 attacks_header_cell_1_1_10 Ground fatalitiesSeptember 11 attacks_header_cell_1_1_11 Total fatalitiesSeptember 11 attacks_header_cell_1_1_12
American AirlinesSeptember 11 attacks_cell_1_2_0 11September 11 attacks_cell_1_2_1 Boeing 767-223ERSeptember 11 attacks_cell_1_2_2 11September 11 attacks_cell_1_2_3 76September 11 attacks_cell_1_2_4 5September 11 attacks_cell_1_2_5 7:59September 11 attacks_cell_1_2_6 8:46September 11 attacks_cell_1_2_7 Logan International AirportSeptember 11 attacks_cell_1_2_8 Los Angeles International AirportSeptember 11 attacks_cell_1_2_9 North Tower of the World Trade CenterSeptember 11 attacks_cell_1_2_10 1600*September 11 attacks_cell_1_2_11 1692^September 11 attacks_cell_1_2_12
United AirlinesSeptember 11 attacks_cell_1_3_0 175September 11 attacks_cell_1_3_1 Boeing 767-222September 11 attacks_cell_1_3_2 9September 11 attacks_cell_1_3_3 51September 11 attacks_cell_1_3_4 5September 11 attacks_cell_1_3_5 8:14September 11 attacks_cell_1_3_6 9:03September 11 attacks_cell_1_3_7 Logan International AirportSeptember 11 attacks_cell_1_3_8 Los Angeles International AirportSeptember 11 attacks_cell_1_3_9 South Tower of the World Trade CenterSeptember 11 attacks_cell_1_3_10 900*September 11 attacks_cell_1_3_11 965^September 11 attacks_cell_1_3_12
American AirlinesSeptember 11 attacks_cell_1_4_0 77September 11 attacks_cell_1_4_1 Boeing 757-223September 11 attacks_cell_1_4_2 6September 11 attacks_cell_1_4_3 53September 11 attacks_cell_1_4_4 5September 11 attacks_cell_1_4_5 8:20September 11 attacks_cell_1_4_6 9:37September 11 attacks_cell_1_4_7 Washington Dulles International AirportSeptember 11 attacks_cell_1_4_8 Los Angeles International AirportSeptember 11 attacks_cell_1_4_9 West wall of PentagonSeptember 11 attacks_cell_1_4_10 125*September 11 attacks_cell_1_4_11 64**September 11 attacks_cell_1_4_12
United AirlinesSeptember 11 attacks_cell_1_5_0 93September 11 attacks_cell_1_5_1 Boeing 757-223September 11 attacks_cell_1_5_2 7September 11 attacks_cell_1_5_3 33September 11 attacks_cell_1_5_4 4September 11 attacks_cell_1_5_5 8:42September 11 attacks_cell_1_5_6 10:03September 11 attacks_cell_1_5_7 Newark Int'l AirportSeptember 11 attacks_cell_1_5_8 San Francisco Int'l AirportSeptember 11 attacks_cell_1_5_9 Field in Stonycreek Township near ShanksvilleSeptember 11 attacks_cell_1_5_10 0September 11 attacks_cell_1_5_11 44**September 11 attacks_cell_1_5_12
Total number of OccupantsSeptember 11 attacks_header_cell_1_6_0 33September 11 attacks_cell_1_6_3 213September 11 attacks_cell_1_6_4 19September 11 attacks_cell_1_6_5 Total number of CasualtiesSeptember 11 attacks_header_cell_1_6_6 2669September 11 attacks_cell_1_6_11 2765September 11 attacks_cell_1_6_12
  • Including emergency workers **Including hijackers Unconfirmed Does not include Hijackers Approximated September 11 attacks_sentence_162

The four crashes September 11 attacks_section_9

See also: Media documentation of the September 11 attacks September 11 attacks_sentence_163

At 8:46 a.m., five hijackers crashed American Airlines Flight 11 into the northern facade of the World Trade Center's North Tower (1 WTC). September 11 attacks_sentence_164

At 9:03 a.m., another five hijackers crashed United Airlines Flight 175 into the southern facade of the South Tower (2 WTC). September 11 attacks_sentence_165

Five hijackers flew American Airlines Flight 77 into the Pentagon at 9:37 a.m. A fourth flight, United Airlines Flight 93, crashed near Shanksville, Pennsylvania, southeast of Pittsburgh, at 10:03 a.m. after the passengers fought the four hijackers. September 11 attacks_sentence_166

Flight 93's target is believed to have been either the Capitol or the White House. September 11 attacks_sentence_167

Flight 93's cockpit voice recorder revealed crew and passengers tried to seize control of the plane from the hijackers after learning through phone calls that Flights 11, 77, and 175 had been crashed into buildings that morning. September 11 attacks_sentence_168

Once it became evident that the passengers might gain control, the hijackers rolled the plane and intentionally crashed it. September 11 attacks_sentence_169

Some passengers and crew members who called from the aircraft using the cabin air phone service and mobile phones provided details: several hijackers were aboard each plane; they used mace, tear gas, or pepper spray to overcome attendants; and some people aboard had been stabbed. September 11 attacks_sentence_170

Reports indicated hijackers stabbed and killed pilots, flight attendants, and one or more passengers. September 11 attacks_sentence_171

According to the 9/11 Commission's final report, the hijackers had recently purchased multi-function hand tools and assorted Leatherman-type utility knives with locking blades, which were not forbidden to passengers at the time, but were not found among the possessions left behind by the hijackers. September 11 attacks_sentence_172

A flight attendant on Flight 11, a passenger on Flight 175, and passengers on Flight 93 said the hijackers had bombs, but one of the passengers said he thought the bombs were fake. September 11 attacks_sentence_173

The FBI found no traces of explosives at the crash sites, and the 9/11 Commission concluded that the bombs were probably fake. September 11 attacks_sentence_174

Three buildings in the World Trade Center collapsed due to fire-induced structural failure. September 11 attacks_sentence_175

The South Tower collapsed at 9:59 a.m. after burning for 56 minutes in a fire caused by the impact of United Airlines Flight 175 and the explosion of its fuel. September 11 attacks_sentence_176

The North Tower collapsed at 10:28 a.m. after burning for 102 minutes. September 11 attacks_sentence_177

When the North Tower collapsed, debris fell on the nearby 7 World Trade Center building (7 WTC), damaging it and starting fires. September 11 attacks_sentence_178

These fires burned for hours, compromising the building's structural integrity, and 7 WTC collapsed at 5:21 p.m. September 11 attacks_sentence_179

The west side of the Pentagon sustained significant damage. September 11 attacks_sentence_180

At 9:42 a.m., the Federal Aviation Administration (FAA) grounded all civilian aircraft within the continental U.S., and civilian aircraft already in flight were told to land immediately. September 11 attacks_sentence_181

All international civilian aircraft were either turned back or redirected to airports in Canada or Mexico, and were banned from landing on United States territory for three days. September 11 attacks_sentence_182

The attacks created widespread confusion among news organizations and air traffic controllers. September 11 attacks_sentence_183

Among the unconfirmed and often contradictory news reports aired throughout the day, one of the most prevalent said a car bomb had been detonated at the U.S. State Department's headquarters in Washington, D.C. Another jet—Delta Air Lines Flight 1989—was suspected of having been hijacked, but the aircraft responded to controllers and landed safely in Cleveland, Ohio. September 11 attacks_sentence_184

In an April 2002 interview, Khalid Sheikh Mohammed and Ramzi bin al-Shibh, who are believed to have organized the attacks, said Flight 93's intended target was the United States Capitol, not the White House. September 11 attacks_sentence_185

During the planning stage of the attacks, Mohamed Atta, the hijacker and pilot of Flight 11, thought the White House might be too tough a target and sought an assessment from Hani Hanjour (who hijacked and piloted Flight 77). September 11 attacks_sentence_186

Mohammed said al-Qaeda initially planned to target nuclear installations rather than the World Trade Center and the Pentagon, but decided against it, fearing things could "get out of control". September 11 attacks_sentence_187

Final decisions on targets, according to Mohammed, were left in the hands of the pilots. September 11 attacks_sentence_188

If any pilot could not reach his intended target, he was to crash the plane. September 11 attacks_sentence_189

Casualties September 11 attacks_section_10

Main articles: Casualties of the September 11 attacks and Emergency workers killed in the September 11 attacks September 11 attacks_sentence_190

The attacks caused the deaths of 2,996 people (including all 19 hijackers) and injured more than 6,000 others. September 11 attacks_sentence_191

The death toll included 265 on the four planes (from which there were no survivors), 2,606 in the World Trade Center and in the surrounding area, and 125 at the Pentagon. September 11 attacks_sentence_192

Most of those who perished were civilians, with the exception of 343 firefighters, 72 law enforcement officers, 55 military personnel, and the 19 terrorists who died in the attacks. September 11 attacks_sentence_193

After New York, New Jersey lost the most state citizens, with the city of Hoboken having the most New Jersey citizens who died in the attacks. September 11 attacks_sentence_194

More than 90 countries lost citizens in the September 11 attacks; for example, the 67 Britons who died were more than in any other terrorist attack anywhere as of October 2002. September 11 attacks_sentence_195

The attacks killed about 500 more people than the attack on Pearl Harbor on December 7, 1941, and are the deadliest terrorist attacks in world history. September 11 attacks_sentence_196

In Arlington County, Virginia, 125 Pentagon workers lost their lives when Flight 77 crashed into the western side of the building. September 11 attacks_sentence_197

Of these, 70 were civilians and 55 were military personnel, many of whom worked for the United States Army or the United States Navy. September 11 attacks_sentence_198

The Army lost 47 civilian employees, six civilian contractors, and 22 soldiers, while the Navy lost six civilian employees, three civilian contractors, and 33 sailors. September 11 attacks_sentence_199

Seven Defense Intelligence Agency (DIA) civilian employees were also among the dead in the attack, as well as an Office of the Secretary of Defense (OSD) contractor. September 11 attacks_sentence_200

Lieutenant General Timothy Maude, an Army Deputy Chief of Staff, was the highest-ranking military official killed at the Pentagon. September 11 attacks_sentence_201

In New York City, more than 90% of the workers and visitors who died in the towers had been at or above the points of impact. September 11 attacks_sentence_202

In the North Tower, 1,355 people at or above the point of impact were trapped and died of smoke inhalation, fell or jumped from the tower to escape the smoke and flames, or were killed in the building's eventual collapse. September 11 attacks_sentence_203

The destruction of all three staircases in the tower when Flight 11 hit made it impossible for anyone above the impact zone to escape. September 11 attacks_sentence_204

107 people below the point of impact died as well. September 11 attacks_sentence_205

In the South Tower, one stairwell, Stairwell A, was left intact after Flight 175 hit, allowing 14 people located on the floors of impact (including one man who saw the plane coming at him) and four more from the floors above to escape. September 11 attacks_sentence_206

New York City 9-1-1 operators who received calls from people inside the tower were not well informed of the situation as it rapidly unfolded and as a result, told callers not to descend the tower on their own. September 11 attacks_sentence_207

In total 630 people died in that tower, fewer than half the number killed in the North Tower. September 11 attacks_sentence_208

Casualties in the South Tower were significantly reduced because some occupants decided to start evacuating as soon as the North Tower was struck. September 11 attacks_sentence_209

The failure to evacuate the South Tower fully after the first jet crash into the North Tower was described by USA Today as "one of the day's great tragedies". September 11 attacks_sentence_210

At least 200 people fell or jumped to their deaths from the burning towers (as exemplified in the photograph The Falling Man), landing on the streets and rooftops of adjacent buildings hundreds of feet below. September 11 attacks_sentence_211

Some occupants of each tower above the point of impact made their way toward the roof in the hope of helicopter rescue, but the roof access doors were locked. September 11 attacks_sentence_212

No plan existed for helicopter rescues, and the combination of roof equipment, thick smoke, and intense heat prevented helicopters from approaching. September 11 attacks_sentence_213

A total of 411 emergency workers died as they tried to rescue people and fight fires. September 11 attacks_sentence_214

The New York City Fire Department (FDNY) lost 343 firefighters, including a chaplain and two paramedics. September 11 attacks_sentence_215

The New York City Police Department (NYPD) lost 23 officers. September 11 attacks_sentence_216

The Port Authority Police Department (PAPD) lost 37 officers. September 11 attacks_sentence_217

Eight emergency medical technicians (EMTs) and paramedics from private emergency medical services units were killed. September 11 attacks_sentence_218

Cantor Fitzgerald L.P., an investment bank on the 101st–105th floors of the North Tower, lost 658 employees, considerably more than any other employer. September 11 attacks_sentence_219

Marsh Inc., located immediately below Cantor Fitzgerald on floors 93–100, lost 358 employees, and 175 employees of Aon Corporation were also killed. September 11 attacks_sentence_220

The National Institute of Standards and Technology (NIST) estimated that about 17,400 civilians were in the World Trade Center complex at the time of the attacks. September 11 attacks_sentence_221

Turnstile counts from the Port Authority suggest 14,154 people were typically in the Twin Towers by 8:45 a.m. September 11 attacks_sentence_222

Most people below the impact zone safely evacuated the buildings. September 11 attacks_sentence_223

September 11 attacks_table_general_2

Deaths (victims + hijackers)September 11 attacks_table_caption_2
New York CitySeptember 11 attacks_header_cell_2_0_0 World Trade CenterSeptember 11 attacks_cell_2_0_1 2,606September 11 attacks_cell_2_0_2
American 11September 11 attacks_cell_2_1_0 87 + 5September 11 attacks_cell_2_1_1
United 175September 11 attacks_cell_2_2_0 60 + 5September 11 attacks_cell_2_2_1
ArlingtonSeptember 11 attacks_header_cell_2_3_0 PentagonSeptember 11 attacks_cell_2_3_1 125September 11 attacks_cell_2_3_2
American 77September 11 attacks_cell_2_4_0 59 + 5September 11 attacks_cell_2_4_1
Near ShanksvilleSeptember 11 attacks_header_cell_2_5_0 United 93September 11 attacks_cell_2_5_1 40 + 4September 11 attacks_cell_2_5_2
TotalSeptember 11 attacks_header_cell_2_6_0 2,977 + 19September 11 attacks_cell_2_6_2

Weeks after the attack, the death toll was estimated to be over 6,000, more than twice the number of deaths eventually confirmed. September 11 attacks_sentence_224

The city was only able to identify remains for about 1,600 of the World Trade Center victims. September 11 attacks_sentence_225

The medical examiner's office collected "about 10,000 unidentified bone and tissue fragments that cannot be matched to the list of the dead". September 11 attacks_sentence_226

Bone fragments were still being found in 2006 by workers who were preparing to demolish the damaged Deutsche Bank Building. September 11 attacks_sentence_227

In 2010, a team of anthropologists and archaeologists searched for human remains and personal items at the Fresh Kills Landfill, where 72 more human remains were recovered, bringing the total found to 1,845. September 11 attacks_sentence_228

DNA profiling continues in an attempt to identify additional victims. September 11 attacks_sentence_229

The remains are being held in storage in Memorial Park, outside the New York City Medical Examiner's facilities. September 11 attacks_sentence_230

It was expected that the remains would be moved in 2013 to a repository behind a wall at the 9/11 museum. September 11 attacks_sentence_231

In July 2011, a team of scientists at the Office of Chief Medical Examiner was still trying to identify remains, in the hope that improved technology will allow them to identify other victims. September 11 attacks_sentence_232

On August 7, 2017, the 1,641st victim was identified as a result of newly available DNA technology, and a 1,642nd on July 26, 2018. September 11 attacks_sentence_233

A further 1,111 victims are yet to be identified. September 11 attacks_sentence_234

Damage September 11 attacks_section_11

Further information: Collapse of the World Trade Center September 11 attacks_sentence_235

Along with the 110-floor Twin Towers, numerous other buildings at the World Trade Center site were destroyed or badly damaged, including WTC buildings 3 through 7 and St. September 11 attacks_sentence_236 Nicholas Greek Orthodox Church. September 11 attacks_sentence_237

The North Tower, South Tower, the Marriott Hotel (3 WTC), and 7 WTC were destroyed. September 11 attacks_sentence_238

The U.S. Customs House (6 World Trade Center), 4 World Trade Center, 5 World Trade Center, and both pedestrian bridges connecting buildings were severely damaged. September 11 attacks_sentence_239

The Deutsche Bank Building (still popularly referred to as the Bankers Trust Building) on 130 Liberty Street was partially damaged and demolished some years later, starting in 2007. September 11 attacks_sentence_240

The two buildings of the World Financial Center also suffered damage. September 11 attacks_sentence_241

The last fires at the World Trade Center site were extinguished on December 20, exactly 100 days after the attacks. September 11 attacks_sentence_242

The Deutsche Bank Building across Liberty Street from the World Trade Center complex was later condemned as uninhabitable because of toxic conditions inside the office tower, and was deconstructed. September 11 attacks_sentence_243

The Borough of Manhattan Community College's Fiterman Hall at 30 West Broadway was condemned due to extensive damage in the attacks, and was reopened in 2012. September 11 attacks_sentence_244

Other neighboring buildings (including 90 West Street and the Verizon Building) suffered major damage but have been restored. September 11 attacks_sentence_245

World Financial Center buildings, One Liberty Plaza, the Millenium Hilton, and 90 Church Street had moderate damage and have since been restored. September 11 attacks_sentence_246

Communications equipment on top of the North Tower was also destroyed, with only WCBS-TV maintaining a backup transmitter on the Empire State Building, but media stations were quickly able to reroute the signals and resume their broadcasts. September 11 attacks_sentence_247

The PATH train system's World Trade Center station was located under the complex. September 11 attacks_sentence_248

As a result, the entire station was demolished completely when the towers collapsed, and the tunnels leading to Exchange Place station in Jersey City, New Jersey were flooded with water. September 11 attacks_sentence_249

The station was rebuilt as the $4 billion World Trade Center Transportation Hub, which reopened in March 2015. September 11 attacks_sentence_250

The Cortlandt Street station on the New York City Subway's IRT Broadway–Seventh Avenue Line was also in close proximity to the World Trade Center complex, and the entire station, along with the surrounding track, was reduced to rubble. September 11 attacks_sentence_251

The latter station was rebuilt and reopened to the public on September 8, 2018. September 11 attacks_sentence_252

The Pentagon was severely damaged by the impact of American Airlines Flight 77 and ensuing fires, causing one section of the building to collapse. September 11 attacks_sentence_253

As the airplane approached the Pentagon, its wings knocked down light poles and its right engine hit a power generator before crashing into the western side of the building. September 11 attacks_sentence_254

The plane hit the Pentagon at the first-floor level. September 11 attacks_sentence_255

The front part of the fuselage disintegrated on impact, while the mid and tail sections kept moving for another fraction of a second. September 11 attacks_sentence_256

Debris from the tail section penetrated furthest into the building, breaking through 310 feet (94 m) of the three outermost of the building's five rings. September 11 attacks_sentence_257

Rescue efforts September 11 attacks_section_12

Main article: Rescue and recovery effort after the September 11 attacks on the World Trade Center September 11 attacks_sentence_258

The New York City Fire Department deployed 200 units (half of the department) to the World Trade Center. September 11 attacks_sentence_259

Their efforts were supplemented by numerous off-duty firefighters and emergency medical technicians. September 11 attacks_sentence_260

The New York City Police Department sent Emergency Service Units and other police personnel and deployed its aviation unit. September 11 attacks_sentence_261

Once on the scene, the FDNY, the NYPD, and the PAPD did not coordinate efforts and performed redundant searches for civilians. September 11 attacks_sentence_262

As conditions deteriorated, the NYPD aviation unit relayed information to police commanders, who issued orders for its personnel to evacuate the towers; most NYPD officers were able to safely evacuate before the buildings collapsed. September 11 attacks_sentence_263

With separate command posts set up and incompatible radio communications between the agencies, warnings were not passed along to FDNY commanders. September 11 attacks_sentence_264

After the first tower collapsed, FDNY commanders issued evacuation warnings. September 11 attacks_sentence_265

Due to technical difficulties with malfunctioning radio repeater systems, many firefighters never heard the evacuation orders. September 11 attacks_sentence_266

9-1-1 dispatchers also received information from callers that was not passed along to commanders on the scene. September 11 attacks_sentence_267

Within hours of the attack, a substantial search and rescue operation was launched. September 11 attacks_sentence_268

After months of around-the-clock operations, the World Trade Center site was cleared by the end of May 2002. September 11 attacks_sentence_269

Aftermath September 11 attacks_section_13

Further information: Aftermath of the September 11 attacks, Airport security repercussions due to the September 11 attacks, Closings and cancellations following the September 11 attacks, Reactions to the September 11 attacks, U.S. September 11 attacks_sentence_270 government response to the September 11 attacks, U.S. September 11 attacks_sentence_271 military response during the September 11 attacks, and September 11 Victim Compensation Fund September 11 attacks_sentence_272

The aftermath of the 9/11 attack resulted in immediate responses to the event, including domestic reactions, hate crimes, Muslim American responses to the event, international responses to the attack, and military responses to the events. September 11 attacks_sentence_273

An extensive compensation program was quickly established by Congress in the aftermath to compensate the victims and families of victims of the 9/11 attack as well. September 11 attacks_sentence_274

Immediate response September 11 attacks_section_14

At 8:32 a.m. FAA officials were notified Flight 11 had been hijacked and they, in turn, notified the North American Aerospace Defense Command (NORAD). September 11 attacks_sentence_275

NORAD scrambled two F-15s from Otis Air National Guard Base in Massachusetts and they were airborne by 8:53 a.m. Because of slow and confused communication from FAA officials, NORAD had 9 minutes' notice that Flight 11 had been hijacked, and no notice about any of the other flights before they crashed. September 11 attacks_sentence_276

After both of the Twin Towers had already been hit, more fighters were scrambled from Langley Air Force Base in Virginia at 9:30 a.m. At 10:20 a.m. Vice President Dick Cheney issued orders to shoot down any commercial aircraft that could be positively identified as being hijacked. September 11 attacks_sentence_277

These instructions were not relayed in time for the fighters to take action. September 11 attacks_sentence_278

Some fighters took to the air without live ammunition, knowing that to prevent the hijackers from striking their intended targets, the pilots might have to intercept and crash their fighters into the hijacked planes, possibly ejecting at the last moment. September 11 attacks_sentence_279

For the first time in U.S. history, SCATANA was invoked, thus stranding tens of thousands of passengers across the world. September 11 attacks_sentence_280

Ben Sliney, in his first day as the National Operations Manager of the FAA, ordered that American airspace would be closed to all international flights, causing about five hundred flights to be turned back or redirected to other countries. September 11 attacks_sentence_281

Canada received 226 of the diverted flights and launched Operation Yellow Ribbon to deal with the large numbers of grounded planes and stranded passengers. September 11 attacks_sentence_282

The 9/11 attacks had immediate effects on the American people. September 11 attacks_sentence_283

Police and rescue workers from around the country took a leave of absence from their jobs and traveled to New York City to help recover bodies from the twisted remnants of the Twin Towers. September 11 attacks_sentence_284

Blood donations across the U.S. surged in the weeks after 9/11. September 11 attacks_sentence_285

The deaths of adults in the attacks resulted in over 3,000 children losing a parent. September 11 attacks_sentence_286

Subsequent studies documented children's reactions to these actual losses and to feared losses of life, the protective environment in the aftermath of the attacks, and effects on surviving caregivers. September 11 attacks_sentence_287

Domestic reactions September 11 attacks_section_15

Following the attacks, President George W. Bush's approval rating soared to 90%. September 11 attacks_sentence_288

On September 20, 2001, he addressed the nation and a joint session of the United States Congress regarding the events of September 11 and the subsequent nine days of rescue and recovery efforts, and described his intended response to the attacks. September 11 attacks_sentence_289

New York City mayor Rudy Giuliani's highly visible role won him high praise in New York and nationally. September 11 attacks_sentence_290

Many relief funds were immediately set up to assist victims of the attacks, with the task of providing financial assistance to the survivors of the attacks and to the families of victims. September 11 attacks_sentence_291

By the deadline for victim's compensation on September 11, 2003, 2,833 applications had been received from the families of those who were killed. September 11 attacks_sentence_292

Contingency plans for the continuity of government and the evacuation of leaders were implemented soon after the attacks. September 11 attacks_sentence_293

Congress was not told that the United States had been under a continuity of government status until February 2002. September 11 attacks_sentence_294

In the largest restructuring of the U.S. government in contemporary history, the United States enacted the Homeland Security Act of 2002, creating the Department of Homeland Security. September 11 attacks_sentence_295

Congress also passed the USA PATRIOT Act, saying it would help detect and prosecute terrorism and other crimes. September 11 attacks_sentence_296

Civil liberties groups have criticized the PATRIOT Act, saying it allows law enforcement to invade the privacy of citizens and that it eliminates judicial oversight of law enforcement and domestic intelligence. September 11 attacks_sentence_297

In an effort to effectively combat future acts of terrorism, the National Security Agency (NSA) was given broad powers. September 11 attacks_sentence_298

NSA commenced warrantless surveillance of telecommunications, which was sometimes criticized since it permitted the agency "to eavesdrop on telephone and e-mail communications between the United States and people overseas without a warrant". September 11 attacks_sentence_299

In response to requests by various intelligence agencies, the United States Foreign Intelligence Surveillance Court permitted an expansion of powers by the U.S. government in seeking, obtaining, and sharing information on U.S. citizens as well as non-U.S. people from around the world. September 11 attacks_sentence_300

Hate crimes September 11 attacks_section_16

Shortly after the attacks, President Bush made a public appearance at Washington, D.C.'s largest Islamic Center and acknowledged the "incredibly valuable contribution" that millions of American Muslims made to their country and called for them "to be treated with respect." September 11 attacks_sentence_301

Numerous incidents of harassment and hate crimes against Muslims and South Asians were reported in the days following the attacks. September 11 attacks_sentence_302

Sikhs were also targeted because Sikh males usually wear turbans, which are stereotypically associated with Muslims. September 11 attacks_sentence_303

There were reports of attacks on mosques and other religious buildings (including the firebombing of a Hindu temple), and assaults on people, including one murder: Balbir Singh Sodhi, a Sikh mistaken for a Muslim, was fatally shot on September 15, 2001, in Mesa, Arizona. September 11 attacks_sentence_304

Two dozen members of Osama bin Laden's family were urgently evacuated out of the country on a private charter plane under FBI supervision three days after the attacks. September 11 attacks_sentence_305

According to an academic study, people perceived to be Middle Eastern were as likely to be victims of hate crimes as followers of Islam during this time. September 11 attacks_sentence_306

The study also found a similar increase in hate crimes against people who may have been perceived as Muslims, Arabs, and others thought to be of Middle Eastern origin. September 11 attacks_sentence_307

A report by the South Asian American advocacy group known as South Asian Americans Leading Together, documented media coverage of 645 bias incidents against Americans of South Asian or Middle Eastern descent between September 11 and 17. September 11 attacks_sentence_308

Various crimes such as vandalism, arson, assault, shootings, harassment, and threats in numerous places were documented. September 11 attacks_sentence_309

Muslim American response September 11 attacks_section_17

Muslim organizations in the United States were swift to condemn the attacks and called "upon Muslim Americans to come forward with their skills and resources to help alleviate the sufferings of the affected people and their families". September 11 attacks_sentence_310

These organizations included the Islamic Society of North America, American Muslim Alliance, American Muslim Council, Council on American-Islamic Relations, Islamic Circle of North America, and the Shari'a Scholars Association of North America. September 11 attacks_sentence_311

Along with monetary donations, many Islamic organizations launched blood drives and provided medical assistance, food, and shelter for victims. September 11 attacks_sentence_312

International reactions September 11 attacks_section_18

Main article: Reactions to the September 11 attacks September 11 attacks_sentence_313

The attacks were denounced by mass media and governments worldwide. September 11 attacks_sentence_314

Across the globe, nations offered pro-American support and solidarity. September 11 attacks_sentence_315

Leaders in most Middle Eastern countries, and Afghanistan, condemned the attacks. September 11 attacks_sentence_316

Iraq was a notable exception, with an immediate official statement that, "the American cowboys are reaping the fruit of their crimes against humanity". September 11 attacks_sentence_317

The government of Saudi Arabia officially condemned the attacks, but privately many Saudis favored bin Laden's cause. September 11 attacks_sentence_318

Although Palestinian Authority (PA) president Yasser Arafat also condemned the attacks, there were reports of celebrations of disputed size in the West Bank, Gaza Strip, and East Jerusalem. September 11 attacks_sentence_319

Footage by CNN and other news outlets were suggested to be from 1991, which was later proven to be a false accusation, resulting in a statement being issued by CNN. September 11 attacks_sentence_320

As in the United States, the aftermath of the attacks saw tensions increase in other countries between Muslims and non-Muslims. September 11 attacks_sentence_321

United Nations Security Council Resolution 1368 condemned the attacks, and expressed readiness to take all necessary steps to respond and combat all forms of terrorism in accordance with their Charter. September 11 attacks_sentence_322

Numerous countries introduced anti-terrorism legislation and froze bank accounts they suspected of al-Qaeda ties. September 11 attacks_sentence_323

Law enforcement and intelligence agencies in a number of countries arrested alleged terrorists. September 11 attacks_sentence_324

British Prime Minister Tony Blair said Britain stood "shoulder to shoulder" with the United States. September 11 attacks_sentence_325

A few days later, Blair flew to Washington, D.C. to affirm British solidarity with the United States. September 11 attacks_sentence_326

In a speech to Congress, nine days after the attacks, which Blair attended as a guest, President Bush declared "America has no truer friend than Great Britain." September 11 attacks_sentence_327

Subsequently, Prime Minister Blair embarked on two months of diplomacy to rally international support for military action; he held 54 meetings with world leaders and traveled more than 40,000 miles (60,000 km). September 11 attacks_sentence_328

In the aftermath of the attacks, tens of thousands of people attempted to flee Afghanistan due to the possibility of a military retaliation by the United States. September 11 attacks_sentence_329

Pakistan, already home to many Afghan refugees from previous conflicts, closed its border with Afghanistan on September 17, 2001. September 11 attacks_sentence_330

Approximately one month after the attacks, the United States led a broad coalition of international forces to overthrow the Taliban regime from Afghanistan for their harboring of al-Qaeda. September 11 attacks_sentence_331

Though Pakistani authorities were initially reluctant to align themselves with the United States against the Taliban, they permitted the coalition access to their military bases, and arrested and handed over to the U.S. over 600 suspected al-Qaeda members. September 11 attacks_sentence_332

The U.S. set up the Guantanamo Bay detention camp to hold inmates they defined as "illegal enemy combatants". September 11 attacks_sentence_333

The legitimacy of these detentions has been questioned by the European Union and human rights organizations. September 11 attacks_sentence_334

On September 25, 2001, Iran's fifth president, Mohammad Khatami meeting British Foreign Secretary, Jack Straw, said: "Iran fully understands the feelings of the Americans about the terrorist attacks in New York and Washington on September 11." September 11 attacks_sentence_335

He said although the American administrations had been at best indifferent about terrorist operations in Iran (since 1979), the Iranians instead felt differently and had expressed their sympathetic feelings with bereaved Americans in the tragic incidents in the two cities. September 11 attacks_sentence_336

He also stated that "Nations should not be punished in place of terrorists." September 11 attacks_sentence_337

According to Radio Farda's website, when the attacks' news was released, some Iranian citizens gathered in front of the Embassy of Switzerland in Tehran, which serves as the protecting power of the United States in Iran (U.S. interests protecting office in Iran), to express their sympathy and some of them lit candles as a symbol of mourning. September 11 attacks_sentence_338

This piece of news at Radio Farda's website also states that in 2011, on the anniversary of the attacks, United States Department of State, published a post at its blog, in which the Department thanked Iranian people for their sympathy and stated that they would never forget Iranian people's kindness on those harsh days. September 11 attacks_sentence_339

After the attacks, both the President and the Supreme Leader of Iran, condemned the attacks. September 11 attacks_sentence_340

The BBC and Time magazine published reports on holding candlelit vigils for the victims by Iranian citizens at their websites. September 11 attacks_sentence_341

According to Politico Magazine, following the attacks, Sayyed Ali Khamenei, the Supreme Leader of Iran, "suspended the usual 'Death to America' chants at Friday prayers" temporarily. September 11 attacks_sentence_342

In a speech by the Nizari Ismaili Imam at the Nobel Institute in 2005, Aga Khan IV stated that the "9/11 attack on the United States was a direct consequence of the international community ignoring the human tragedy that was Afghanistan at that time". September 11 attacks_sentence_343

In September 2001, shortly after the attacks, Greek soccer fans burned an Israeli flag and unsuccessfully tried to burn an American flag. September 11 attacks_sentence_344

Though the American flag did not catch fire, the fans booed during a moment of silence for victims of the attacks. September 11 attacks_sentence_345

Military operations September 11 attacks_section_19

Further information: War on Terror September 11 attacks_sentence_346

At 2:40 p.m. in the afternoon of September 11, Secretary of Defense Donald Rumsfeld was issuing rapid orders to his aides to look for evidence of Iraqi involvement. September 11 attacks_sentence_347

According to notes taken by senior policy official Stephen Cambone, Rumsfeld asked for, "Best info fast. September 11 attacks_sentence_348

Judge whether good enough hit S.H. September 11 attacks_sentence_349

[Saddam Hussein] at same time. September 11 attacks_sentence_350

Not only UBL" [Osama bin Laden]. September 11 attacks_sentence_351

Cambone's notes quoted Rumsfeld as saying, "Need to move swiftly—Near term target needs—go massive—sweep it all up. September 11 attacks_sentence_352

Things related and not." September 11 attacks_sentence_353

In a meeting at Camp David on September 15 the Bush administration rejected the idea of attacking Iraq in response to 9/11. September 11 attacks_sentence_354

Nonetheless, they later invaded the country with allies, citing "Saddam Hussein's support for terrorism". September 11 attacks_sentence_355

At the time, as many as 7 in 10 Americans believed the Iraqi president played a role in the 9/11 attacks. September 11 attacks_sentence_356

Three years later, Bush conceded that he had not. September 11 attacks_sentence_357

The NATO council declared that the terrorist attacks on the United States were an attack on all NATO nations that satisfied Article 5 of the NATO charter. September 11 attacks_sentence_358

This marked the first invocation of Article 5, which had been written during the Cold War with an attack by the Soviet Union in mind. September 11 attacks_sentence_359

Australian Prime Minister John Howard who was in Washington, D.C. during the attacks invoked Article IV of the ANZUS treaty. September 11 attacks_sentence_360

The Bush administration announced a War on Terror, with the stated goals of bringing bin Laden and al-Qaeda to justice and preventing the emergence of other terrorist networks. September 11 attacks_sentence_361

These goals would be accomplished by imposing economic and military sanctions against states harboring terrorists, and increasing global surveillance and intelligence sharing. September 11 attacks_sentence_362

On September 14, 2001, the U.S. September 11 attacks_sentence_363 Congress passed the Authorization for Use of Military Force Against Terrorists. September 11 attacks_sentence_364

Still in effect, it grants the President the authority to use all "necessary and appropriate force" against those whom he determined "planned, authorized, committed or aided" the September 11 attacks, or who harbored said persons or groups. September 11 attacks_sentence_365

On October 7, 2001, the War in Afghanistan began when U.S. and British forces initiated aerial bombing campaigns targeting Taliban and al-Qaeda camps, then later invaded Afghanistan with ground troops of the Special Forces. September 11 attacks_sentence_366

This eventually led to the overthrow of the Taliban rule of Afghanistan with the Fall of Kandahar on December 7, 2001, by U.S.-led coalition forces. September 11 attacks_sentence_367

Conflict in Afghanistan between the Taliban insurgency and the Afghan forces backed by NATO Resolute Support Mission is ongoing. September 11 attacks_sentence_368

The Philippines and Indonesia, among other nations with their own internal conflicts with Islamic terrorism, also increased their military readiness. September 11 attacks_sentence_369

The military forces of the United States of America and the Islamic Republic of Iran cooperated with each other to overthrow the Taliban regime which had had conflicts with the government of Iran. September 11 attacks_sentence_370

Iran's Quds Force helped U.S. forces and Afghan rebels in the 2001 uprising in Herat. September 11 attacks_sentence_371

Effects September 11 attacks_section_20

Health issues September 11 attacks_section_21

Main article: Health effects arising from the September 11 attacks September 11 attacks_sentence_372

Hundreds of thousands of tons of toxic debris containing more than 2,500 contaminants, including known carcinogens, were spread across Lower Manhattan due to the collapse of the Twin Towers. September 11 attacks_sentence_373

Exposure to the toxins in the debris is alleged to have contributed to fatal or debilitating illnesses among people who were at Ground Zero. September 11 attacks_sentence_374

The Bush administration ordered the Environmental Protection Agency (EPA) to issue reassuring statements regarding air quality in the aftermath of the attacks, citing national security, but the EPA did not determine that air quality had returned to pre-September 11 levels until June 2002. September 11 attacks_sentence_375

Health effects extended to residents, students, and office workers of Lower Manhattan and nearby Chinatown. September 11 attacks_sentence_376

Several deaths have been linked to the toxic dust, and the victims' names were included in the World Trade Center memorial. September 11 attacks_sentence_377

Approximately 18,000 people have been estimated to have developed illnesses as a result of the toxic dust. September 11 attacks_sentence_378

There is also scientific speculation that exposure to various toxic products in the air may have negative effects on fetal development. September 11 attacks_sentence_379

A notable children's environmental health center is currently analyzing the children whose mothers were pregnant during the WTC collapse, and were living or working nearby. September 11 attacks_sentence_380

A study of rescue workers released in April 2010 found that all those studied had impaired lung functions, and that 30–40% were reporting little or no improvement in persistent symptoms that started within the first year of the attack. September 11 attacks_sentence_381

Years after the attacks, legal disputes over the costs of illnesses related to the attacks were still in the court system. September 11 attacks_sentence_382

On October 17, 2006, a federal judge rejected New York City's refusal to pay for health costs for rescue workers, allowing for the possibility of numerous suits against the city. September 11 attacks_sentence_383

Government officials have been faulted for urging the public to return to lower Manhattan in the weeks shortly after the attacks. September 11 attacks_sentence_384

Christine Todd Whitman, administrator of the EPA in the aftermath of the attacks, was heavily criticized by a U.S. District Judge for incorrectly saying that the area was environmentally safe. September 11 attacks_sentence_385

Mayor Giuliani was criticized for urging financial industry personnel to return quickly to the greater Wall Street area. September 11 attacks_sentence_386

On December 22, 2010, the United States Congress passed the James L. Zadroga 9/11 Health and Compensation Act, which President Barack Obama signed into law on January 2, 2011. September 11 attacks_sentence_387

It allocated $4.2 billion to create the World Trade Center Health Program, which provides testing and treatment for people suffering from long-term health problems related to the 9/11 attacks. September 11 attacks_sentence_388

The WTC Health Program replaced preexisting 9/11-related health programs such as the Medical Monitoring and Treatment Program and the WTC Environmental Health Center program. September 11 attacks_sentence_389

Economic September 11 attacks_section_22

Main article: Economic effects arising from the September 11 attacks September 11 attacks_sentence_390

The attacks had a significant economic impact on United States and world markets. September 11 attacks_sentence_391

The stock exchanges did not open on September 11 and remained closed until September 17. September 11 attacks_sentence_392

Reopening, the Dow Jones Industrial Average (DJIA) fell 684 points, or 7.1%, to 8921, a record-setting one-day point decline. September 11 attacks_sentence_393

By the end of the week, the DJIA had fallen 1,369.7 points (14.3%), at the time its largest one-week point drop in history. September 11 attacks_sentence_394

In 2001 dollars, U.S. stocks lost $1.4 trillion in valuation for the week. September 11 attacks_sentence_395

In New York City, about 430,000 job-months and $2.8 billion in wages were lost in the first three months after the attacks. September 11 attacks_sentence_396

The economic effects were mainly on the economy's export sectors. September 11 attacks_sentence_397

The city's GDP was estimated to have declined by $27.3 billion for the last three months of 2001 and all of 2002. September 11 attacks_sentence_398

The U.S. government provided $11.2 billion in immediate assistance to the Government of New York City in September 2001, and $10.5 billion in early 2002 for economic development and infrastructure needs. September 11 attacks_sentence_399

Also hurt were small businesses in Lower Manhattan near the World Trade Center, 18,000 of which were destroyed or displaced, resulting in lost jobs and their consequent wages. September 11 attacks_sentence_400

Assistance was provided by Small Business Administration loans, federal government Community Development Block Grants, and Economic Injury Disaster Loans. September 11 attacks_sentence_401

Some 31,900,000 square feet (2,960,000 m) of Lower Manhattan office space was damaged or destroyed. September 11 attacks_sentence_402

Many wondered whether these jobs would return, and if the damaged tax base would recover. September 11 attacks_sentence_403

Studies of the economic effects of 9/11 show the Manhattan office real-estate market and office employment were less affected than first feared, because of the financial services industry's need for face-to-face interaction. September 11 attacks_sentence_404

North American air space was closed for several days after the attacks and air travel decreased upon its reopening, leading to a nearly 20% cutback in air travel capacity, and exacerbating financial problems in the struggling U.S. September 11 attacks_sentence_405 airline industry. September 11 attacks_sentence_406

The September 11 attacks also led to the U.S. wars in Afghanistan and Iraq, as well as additional homeland security spending, totaling at least $5 trillion. September 11 attacks_sentence_407

Cultural influence September 11 attacks_section_23

Main article: Cultural influence of the September 11 attacks September 11 attacks_sentence_408

The impact of 9/11 extends beyond geopolitics into society and culture in general. September 11 attacks_sentence_409

Immediate responses to 9/11 included greater focus on home life and time spent with family, higher church attendance, and increased expressions of patriotism such as the flying of flags. September 11 attacks_sentence_410

The radio industry responded by removing certain songs from playlists, and the attacks have subsequently been used as background, narrative, or thematic elements in film, television, music, and literature. September 11 attacks_sentence_411

Already-running television shows as well as programs developed after 9/11 have reflected post-9/11 cultural concerns. September 11 attacks_sentence_412

9/11 conspiracy theories have become social phenomena, despite lack of support from expert scientists, engineers, and historians. September 11 attacks_sentence_413

9/11 has also had a major impact on the religious faith of many individuals; for some it strengthened, to find consolation to cope with the loss of loved ones and overcome their grief; others started to question their faith or lost it entirely, because they could not reconcile it with their view of religion. September 11 attacks_sentence_414

The culture of America succeeding the attacks is noted for heightened security and an increased demand thereof, as well as paranoia and anxiety regarding future terrorist attacks that includes most of the nation. September 11 attacks_sentence_415

Psychologists have also confirmed that there has been an increased amount of national anxiety in commercial air travel. September 11 attacks_sentence_416

Anti-Muslim hate crimes rose nearly ten-fold in 2001, and have subsequently remained "roughly five times higher than the pre-9/11 rate." September 11 attacks_sentence_417

Government policies toward terrorism September 11 attacks_section_24

As a result of the attacks, many governments across the world passed legislation to combat terrorism. September 11 attacks_sentence_418

In Germany, where several of the 9/11 terrorists had resided and taken advantage of that country's liberal asylum policies, two major anti-terrorism packages were enacted. September 11 attacks_sentence_419

The first removed legal loopholes that permitted terrorists to live and raise money in Germany. September 11 attacks_sentence_420

The second addressed the effectiveness and communication of intelligence and law enforcement. September 11 attacks_sentence_421

Canada passed the Canadian Anti-Terrorism Act, their first anti-terrorism law. September 11 attacks_sentence_422

The United Kingdom passed the Anti-terrorism, Crime and Security Act 2001 and the Prevention of Terrorism Act 2005. September 11 attacks_sentence_423

New Zealand enacted the Terrorism Suppression Act 2002. September 11 attacks_sentence_424

In the United States, the Department of Homeland Security was created by the Homeland Security Act to coordinate domestic anti-terrorism efforts. September 11 attacks_sentence_425

The USA Patriot Act gave the federal government greater powers, including the authority to detain foreign terror suspects for a week without charge, to monitor telephone communications, e-mail, and Internet use by terror suspects, and to prosecute suspected terrorists without time restrictions. September 11 attacks_sentence_426

The FAA ordered that airplane cockpits be reinforced to prevent terrorists gaining control of planes, and assigned sky marshals to flights. September 11 attacks_sentence_427

Further, the Aviation and Transportation Security Act made the federal government, rather than airports, responsible for airport security. September 11 attacks_sentence_428

The law created the Transportation Security Administration to inspect passengers and luggage, causing long delays and concern over passenger privacy. September 11 attacks_sentence_429

After suspected abuses of the USA Patriot Act were brought to light in June 2013 with articles about collection of American call records by the NSA and the PRISM program (see 2013 mass surveillance disclosures), Representative Jim Sensenbrenner, Republican of Wisconsin, who introduced the Patriot Act in 2001, said that the National Security Agency overstepped its bounds. September 11 attacks_sentence_430

Investigations September 11 attacks_section_25

FBI September 11 attacks_section_26

Further information: Hijackers in the September 11 attacks September 11 attacks_sentence_431

Immediately after the attacks, the Federal Bureau of Investigation started PENTTBOM, the largest criminal inquiry in the history of the United States. September 11 attacks_sentence_432

At its height, more than half of the FBI's agents worked on the investigation and followed a half-million leads. September 11 attacks_sentence_433

The FBI concluded that there was "clear and irrefutable" evidence linking al-Qaeda and bin Laden to the attacks. September 11 attacks_sentence_434

The FBI was quickly able to identify the hijackers, including leader Mohamed Atta, when his luggage was discovered at Boston's Logan Airport. September 11 attacks_sentence_435

Atta had been forced to check two of his three bags due to space limitations on the 19-seat commuter flight he took to Boston. September 11 attacks_sentence_436

Due to a new policy instituted to prevent flight delays, the luggage failed to make it aboard American Airlines Flight 11 as planned. September 11 attacks_sentence_437

The luggage contained the hijackers' names, assignments, and al-Qaeda connections. September 11 attacks_sentence_438

"It had all these Arab-language sic papers that amounted to the Rosetta stone of the investigation", said one FBI agent. September 11 attacks_sentence_439

Within hours of the attacks, the FBI released the names and in many cases the personal details of the suspected pilots and hijackers. September 11 attacks_sentence_440

On September 27, 2001, they released photos of all 19 hijackers, along with information about possible nationalities and aliases. September 11 attacks_sentence_441

Fifteen of the men were from Saudi Arabia, two from the United Arab Emirates, one from Egypt, and one from Lebanon. September 11 attacks_sentence_442

By midday, the U.S. National Security Agency and German intelligence agencies had intercepted communications pointing to Osama bin Laden. September 11 attacks_sentence_443

Two of the hijackers were known to have travelled with a bin Laden associate to Malaysia in 2000 and hijacker Mohammed Atta had previously gone to Afghanistan. September 11 attacks_sentence_444

He and others were part of a terrorist cell in Hamburg. September 11 attacks_sentence_445

One of the members of the Hamburg cell was discovered to have been in communication with Khalid Sheik Mohammed who was identified as a member of al-Qaeda. September 11 attacks_sentence_446

Authorities in the United States and United Kingdom also obtained electronic intercepts, including telephone conversations and electronic bank transfers, which indicate that Mohammed Atef, a bin Laden deputy, was a key figure in the planning of the 9/11 attacks. September 11 attacks_sentence_447

Intercepts were also obtained that revealed conversations that took place days before September 11 between bin Laden and an associate in Pakistan. September 11 attacks_sentence_448

In those conversations, the two referred to "an incident that would take place in America on, or around, September 11" and they discussed potential repercussions. September 11 attacks_sentence_449

In another conversation with an associate in Afghanistan, bin Laden discussed the "scale and effects of a forthcoming operation." September 11 attacks_sentence_450

These conversations did not specifically mention the World Trade Center or Pentagon, or other specifics. September 11 attacks_sentence_451

The FBI did not record the 2,977 deaths from the attacks in their annual violent crime index for 2001. September 11 attacks_sentence_452

In a disclaimer, the FBI stated that "the number of deaths is so great that combining it with the traditional crime statistics will have an outlier effect that falsely skews all types of measurements in the program's analyses." September 11 attacks_sentence_453

New York City also did not include the deaths in their annual crime statistics for 2001. September 11 attacks_sentence_454

CIA September 11 attacks_section_27

The Inspector General of the Central Intelligence Agency (CIA) conducted an internal review of the agency's pre-9/11 performance and was harshly critical of senior CIA officials for not doing everything possible to confront terrorism. September 11 attacks_sentence_455

He criticized their failure to stop two of the 9/11 hijackers, Nawaf al-Hazmi and Khalid al-Mihdhar, as they entered the United States and their failure to share information on the two men with the FBI. September 11 attacks_sentence_456

In May 2007, senators from both major U.S. political parties drafted legislation to make the review public. September 11 attacks_sentence_457

One of the backers, Senator Ron Wyden said, "The American people have a right to know what the Central Intelligence Agency was doing in those critical months before 9/11." September 11 attacks_sentence_458

Congressional inquiry September 11 attacks_section_28

Main article: Joint Inquiry into Intelligence Community Activities before and after the Terrorist Attacks of September 11, 2001 September 11 attacks_sentence_459

In February 2002, the Senate Select Committee on Intelligence and the House Permanent Select Committee on Intelligence formed a joint inquiry into the performance of the U.S. September 11 attacks_sentence_460 Intelligence Community. September 11 attacks_sentence_461

Their 832-page report released in December 2002 detailed failings of the FBI and CIA to use available information, including about terrorists the CIA knew were in the United States, in order to disrupt the plots. September 11 attacks_sentence_462

The joint inquiry developed its information about possible involvement of Saudi Arabian government officials from non-classified sources. September 11 attacks_sentence_463

Nevertheless, the Bush administration demanded 28 related pages remain classified. September 11 attacks_sentence_464

In December 2002, the inquiry's chair Bob Graham (D-FL) revealed in an interview that there was "evidence that there were foreign governments involved in facilitating the activities of at least some of the terrorists in the United States." September 11 attacks_sentence_465

September 11 victim families were frustrated by the unanswered questions and redacted material from the Congressional inquiry and demanded an independent commission. September 11 attacks_sentence_466

September 11 victim families, members of congress and the Saudi Arabian government are still seeking release of the documents. September 11 attacks_sentence_467

In June 2016, CIA chief John Brennan said that he believes 28 redacted pages of a congressional inquiry into 9/11 will soon be made public, and that they will prove that the government of Saudi Arabia had no involvement in the September 11 attacks. September 11 attacks_sentence_468

In September 2016, the Congress passed the Justice Against Sponsors of Terrorism Act that would allow relatives of victims of the September 11 attacks to sue Saudi Arabia for its government's alleged role in the attacks. September 11 attacks_sentence_469

9/11 Commission September 11 attacks_section_29

Main articles: 9/11 Commission, 9/11 Commission Report, and Criticism of the 9/11 Commission September 11 attacks_sentence_470

The National Commission on Terrorist Attacks Upon the United States (9/11 Commission), chaired by Thomas Kean and Lee H. Hamilton, was formed in late 2002 to prepare a thorough account of the circumstances surrounding the attacks, including preparedness for and the immediate response to the attacks. September 11 attacks_sentence_471

On July 22, 2004, the Commission issued the 9/11 Commission Report. September 11 attacks_sentence_472

The report detailed the events of 9/11, found the attacks were carried out by members of al-Qaeda, and examined how security and intelligence agencies were inadequately coordinated to prevent the attacks. September 11 attacks_sentence_473

Formed from an independent bipartisan group of mostly former Senators, Representatives, and Governors, the commissioners explained, "We believe the 9/11 attacks revealed four kinds of failures: in imagination, policy, capabilities, and management". September 11 attacks_sentence_474

The Commission made numerous recommendations on how to prevent future attacks, and in 2011 was dismayed that several of its recommendations had yet to be implemented. September 11 attacks_sentence_475

National Institute of Standards and Technology September 11 attacks_section_30

Main article: The NIST World Trade Center Disaster Investigation September 11 attacks_sentence_476

See also: 7 World Trade Center § 9/11 and collapse September 11 attacks_sentence_477

The U.S. National Institute of Standards and Technology (NIST) investigated the collapses of the Twin Towers and 7 WTC. September 11 attacks_sentence_478

The investigations examined why the buildings collapsed and what fire protection measures were in place, and evaluated how fire protection systems might be improved in future construction. September 11 attacks_sentence_479

The investigation into the collapse of 1 WTC and 2 WTC was concluded in October 2005 and that of 7 WTC was completed in August 2008. September 11 attacks_sentence_480

NIST found that the fireproofing on the Twin Towers' steel infrastructures was blown off by the initial impact of the planes and that, had this not occurred, the towers likely would have remained standing. September 11 attacks_sentence_481

A 2007 study of the north tower's collapse published by researchers of Purdue University determined that, since the plane's impact had stripped off much of the structure's thermal insulation, the heat from a typical office fire would have softened and weakened the exposed girders and columns enough to initiate the collapse regardless of the number of columns cut or damaged by the impact. September 11 attacks_sentence_482

The director of the original investigation stated that "the towers really did amazingly well. September 11 attacks_sentence_483

The terrorist aircraft didn't bring the buildings down; it was the fire which followed. September 11 attacks_sentence_484

It was proven that you could take out two-thirds of the columns in a tower and the building would still stand." September 11 attacks_sentence_485

The fires weakened the trusses supporting the floors, making the floors sag. September 11 attacks_sentence_486

The sagging floors pulled on the exterior steel columns causing the exterior columns to bow inward. September 11 attacks_sentence_487

With the damage to the core columns, the buckling exterior columns could no longer support the buildings, causing them to collapse. September 11 attacks_sentence_488

Additionally, the report found the towers' stairwells were not adequately reinforced to provide adequate emergency escape for people above the impact zones. September 11 attacks_sentence_489

NIST concluded that uncontrolled fires in 7 WTC caused floor beams and girders to heat and subsequently "caused a critical support column to fail, initiating a fire-induced progressive collapse that brought the building down". September 11 attacks_sentence_490

Alleged Saudi role September 11 attacks_section_31

Main articles: Alleged Saudi role in September 11 attacks, Saudi Arabia–United States relations, and Saudi Arabia and state-sponsored terrorism September 11 attacks_sentence_491

In July 2016, the Obama administration released a document, compiled by US investigators Dana Lesemann and Michael Jacobson, known as "File 17", which contains a list naming three dozen people, including the suspected Saudi intelligence officers attached to Saudi Arabia's embassy in Washington, D.C., which connects Saudi Arabia to the hijackers. September 11 attacks_sentence_492

Rebuilding September 11 attacks_section_32

Main articles: Construction of One World Trade Center, World Trade Center site, and World Trade Center (2001–present) September 11 attacks_sentence_493

On the day of the attacks, New York City mayor Rudy Giuliani stated: "We will rebuild. September 11 attacks_sentence_494

We're going to come out of this stronger than before, politically stronger, economically stronger. September 11 attacks_sentence_495

The skyline will be made whole again." September 11 attacks_sentence_496

The damaged section of the Pentagon was rebuilt and occupied within a year of the attacks. September 11 attacks_sentence_497

The temporary World Trade Center PATH station opened in late 2003 and construction of the new 7 World Trade Center was completed in 2006. September 11 attacks_sentence_498

Work on rebuilding the main World Trade Center site was delayed until late 2006 when leaseholder Larry Silverstein and the Port Authority of New York and New Jersey agreed on financing. September 11 attacks_sentence_499

The construction of One World Trade Center began on April 27, 2006, and reached its full height on May 20, 2013. September 11 attacks_sentence_500

The spire was installed atop the building at that date, putting 1 WTC's height at 1,776 feet (541 m) and thus claiming the title of the tallest building in the Western Hemisphere. September 11 attacks_sentence_501

One WTC finished construction and opened on November 3, 2014. September 11 attacks_sentence_502

On the World Trade Center site, three more office towers were to be built one block east of where the original towers stood. September 11 attacks_sentence_503

4 WTC, meanwhile, opened in November 2013, making it the second tower on the site to open behind 7 World Trade Center, as well as the first building on the Port Authority property. September 11 attacks_sentence_504

3 WTC opened on June 11, 2018, becoming the fourth skyscraper at the site to be completed. September 11 attacks_sentence_505

On the 16th anniversary of the 9/11 attacks, a writer for Curbed New York said that although "there is a World Trade Center again", it was not finished, as 2 and 5 WTC did not have definite completion dates, among other things. September 11 attacks_sentence_506

Memorials September 11 attacks_section_33

Main article: Memorials and services for the September 11 attacks September 11 attacks_sentence_507

In the days immediately following the attacks, many memorials and vigils were held around the world, and photographs of the dead and missing were posted around Ground Zero. September 11 attacks_sentence_508

A witness described being unable to "get away from faces of innocent victims who were killed. September 11 attacks_sentence_509

Their pictures are everywhere, on phone booths, street lights, walls of subway stations. September 11 attacks_sentence_510

Everything reminded me of a huge funeral, people quiet and sad, but also very nice. September 11 attacks_sentence_511

Before, New York gave me a cold feeling; now people were reaching out to help each other." September 11 attacks_sentence_512

One of the first memorials was the Tribute in Light, an installation of 88 searchlights at the footprints of the World Trade Center towers. September 11 attacks_sentence_513

In New York City, the World Trade Center Site Memorial Competition was held to design an appropriate memorial on the site. September 11 attacks_sentence_514

The winning design, Reflecting Absence, was selected in August 2006, and consists of a pair of reflecting pools in the footprints of the towers, surrounded by a list of the victims' names in an underground memorial space. September 11 attacks_sentence_515

The memorial was completed on September 11, 2011; a museum also opened on site on May 21, 2014. September 11 attacks_sentence_516

In Arlington County, the Pentagon Memorial was completed and opened to the public on the seventh anniversary of the attacks in 2008. September 11 attacks_sentence_517

It consists of a landscaped park with 184 benches facing the Pentagon. September 11 attacks_sentence_518

When the Pentagon was repaired in 2001–2002, a private chapel and indoor memorial were included, located at the spot where Flight 77 crashed into the building. September 11 attacks_sentence_519

In Shanksville, a concrete and glass visitor center was opened on September 10, 2015, situated on a hill overlooking the crash site and the white marble Wall of Names. September 11 attacks_sentence_520

An observation platform at the visitor center and the white marble wall are both aligned beneath the path of Flight 93. September 11 attacks_sentence_521

A temporary memorial is located 500 yards (457 m) from the crash site. September 11 attacks_sentence_522

New York City firefighters donated a cross made of steel from the World Trade Center and mounted on top of a platform shaped like the Pentagon. September 11 attacks_sentence_523

It was installed outside the firehouse on August 25, 2008. September 11 attacks_sentence_524

Many other permanent memorials are elsewhere. September 11 attacks_sentence_525

Scholarships and charities have been established by the victims' families, and by many other organizations and private figures. September 11 attacks_sentence_526

On every anniversary, in New York City, the names of the victims who died there are read out against a background of somber music. September 11 attacks_sentence_527

The President of the United States attends a memorial service at the Pentagon, and asks Americans to observe Patriot Day with a moment of silence. September 11 attacks_sentence_528

Smaller services are held in Shanksville, Pennsylvania, which are usually attended by the President's spouse. September 11 attacks_sentence_529

See also September 11 attacks_section_34

September 11 attacks_unordered_list_2

Credits to the contents of this page go to the authors of the corresponding Wikipedia page: 11 attacks.