The September 11 attacks (often referred to as September 11th or 9/11) were a series of coordinated suicide attacks by al-Qaeda upon the United States on September 11, 2001. On that morning, 19 al-Qaeda terrorists hijacked four commercial passenger jet airliners.[2][3] The hijackers intentionally crashed two of the airliners into the Twin Towers of the World Trade Center in New York City, killing everyone on board and many others working in the buildings. Both buildings collapsed within two hours, destroying nearby buildings and damaging others. The hijackers crashed a third airliner into the Pentagon in Arlington, Virginia, just outside Washington, D.C. The fourth plane crashed into a field near Shanksville in rural Pennsylvania after some of its passengers and flight crew attempted to retake control of the plane, which the hijackers had redirected toward Washington, D.C. There were no survivors from any of the flights.

Nearly 3,000 victims and the 19 hijackers died in the attacks.[4] According to the New York State Health Department, 836 responders, including firefighters and police personnel, have died as of June 2009.[4] Among the 2,752 victims who died in the attacks on the World Trade Center were 343 firefighters and 60 police officers from New York City and the Port Authority.[5] 184 people were killed in the attacks on the Pentagon.[6] The overwhelming majority of casualties were civilians, including nationals of over 70 countries.[7] In addition, there was at least one secondary death—one person was ruled by a medical examiner to have died from lung disease due to exposure to dust from the collapse of the World Trade Center.[8]

The United States responded to the attacks by launching the War on Terror, invading Afghanistan to depose the Taliban, who had harbored al-Qaeda terrorists, and enacting the USA PATRIOT Act. Many other countries also strengthened their anti-terrorism legislation and expanded law enforcement powers. Some American stock exchanges stayed closed for the rest of the week following the attack, and posted enormous losses upon reopening, especially in the airline and insurance industries. The destruction of billions of dollars' worth of office space caused serious damage to the economy of Lower Manhattan.

The damage to the Pentagon was cleared and repaired within a year, and the Pentagon Memorial was built adjacent to the building. The rebuilding process has started on the World Trade Center site. In 2006, a new office tower was completed on the site of 7 World Trade Center. The new 1 World Trade Center is currently under construction at the site and, at 1,776 ft (541 m) upon completion in 2013, it will become the tallest building in North America. Three more towers were originally expected to be built between 2007 and 2012 on the site. Ground was broken for the Flight 93 National Memorial on November 8, 2009, and the first phase of construction is expected to be ready for the 10th anniversary of the attacks on September 11, 2011.[9]

 

Attacks

 
Early on the morning of September 11, 2001, nineteen hijackers took control of four commercial airliners en route to San Francisco and Los Angeles from Boston, Newark, and Washington, D.C..[11] At 8:46 a.m., American Airlines Flight 11 was crashed into the World Trade Center's North Tower, followed by United Airlines Flight 175, which hit the South Tower at 9:03 a.m.[12][13]

Another group of hijackers flew American Airlines Flight 77 into the Pentagon at 9:37 a.m.[14] A fourth flight, United Airlines Flight 93, crashed near Shanksville, Pennsylvania, at 10:03 a.m, after the passengers on board engaged in a fight with the hijackers. Its ultimate target was thought to be either the Capitol (the meeting place of the United States Congress) or the White House.[15][16]

Some passengers were able to make phone calls using the cabin airphone service and mobile phones,[17][18] and provide details, including that several hijackers were aboard each plane, that mace or other form of noxious chemical spray, such as tear gas or pepper spray was used, and that some people aboard had been stabbed.[19][20][21][22] Reports indicated that during two of the flights, the hijackers stabbed and killed aircraft pilots, flight attendants and in at least one case, a passenger.[23][24] The 9/11 Commission established that two of the hijackers had recently purchased Leatherman multi-function hand tools.[25] A flight attendant on Flight 11, a passenger on Flight 175, and passengers on Flight 93 mentioned that the hijackers had bombs, but one of the passengers also mentioned he thought the bombs were fake. No traces of explosives were found at the crash sites, and the 9/11 Commission believed the bombs were probably fake.[23]

On United Airlines Flight 93, a transcript of audio recorded by the cockpit voice recorder revealed that crew and passengers attempted to seize control of the plane from the hijackers after learning through phone calls that similarly hijacked planes had been crashed into buildings that morning.[26] One of the hijackers gave the order to roll the plane once it became evident that they would lose control of the plane to the passengers.[27] Soon afterward, the aircraft crashed into a field near Shanksville in Stonycreek Township, Somerset County, Pennsylvania, at 10:03:11 a.m. local time (14:03:11 UTC).

In a September 2002 interview conducted by documentary-maker Yosri Fouda, an al Jazeera journalist, Khalid Sheikh Mohammed and Ramzi Binalshibh, who are believed to have organised the attacks, stated that the fourth hijacked plane was heading for the United States Capitol, which they gave the codename "the Faculty of Law",[28] not for the White House. They further stated that al-Qaeda initially planned to fly hijacked jets into nuclear installations rather than the World Trade Center and the Pentagon, but it was decided not to attack nuclear power plants "for the moment" because of fears it could "get out of control".[29]

Three buildings in the World Trade Center Complex collapsed due to structural failure on the day of the attack.[30] The south tower (2 WTC) fell at approximately 9:59 a.m., after burning for 56 minutes in a fire caused by the impact of United Airlines Flight 175.[30] The north tower (1 WTC) collapsed at 10:28 a.m., after burning for approximately 102 minutes.[30] When the north tower collapsed, debris that fell on the nearby 7 World Trade Center (7 WTC) building damaged it and initiated fires. These fires burned for hours and compromised the building's structural integrity, which led to the crumbling of the east penthouse at 5:20 p.m. and to the complete collapse of the building at 5:21 p.m.[31][32]

The attacks created widespread confusion among news organizations and air traffic controllers across the United States. All international civilian air traffic was banned from landing on U.S. soil for three days.[33] Aircraft already in flight were either turned back or redirected to airports in Canada or Mexico. News sources aired unconfirmed and often contradictory reports throughout the day. One of the most prevalent of these reported that a car bomb had been detonated at the U.S. State Department's headquarters in Washington, D.C.[34] Soon after reporting for the first time on the Pentagon crash, some news media also briefly reported that a fire had broken out on the National Mall.[35] Another report went out on the Associated Press wire, claiming that a Delta Air Lines airliner—Flight 1989—had been hijacked. This report, too, turned out to be in error; the plane was briefly thought to represent a hijack risk, but it responded to controllers and landed safely in Cleveland, Ohio.[36]

 

Casualties

 

 

There were a total of 2,996 deaths, including the 19 hijackers and 2,977 victims.[44] The victims were distributed as follows: 246 on the four planes (from which there were no survivors), 2,606 in New York City in the towers and on the ground, and 125 at the Pentagon.[37][45] All the deaths in the attacks were civilians except for 55 military personnel killed in the attack on the Pentagon.[46]

More than 90 countries lost citizens in the attacks on the World Trade Center.[47] In 2007, the New York City medical examiner's office added Felicia Dunn-Jones to the official death toll from the September 11 attacks. Dunn-Jones died five months after 9/11 from a lung condition which was linked to exposure to dust during the collapse of the World Trade Center.[48] Leon Heyward, who died of lymphoma in 2008, was added to the official death toll in 2009.[49]

NIST estimated that about 17,400 civilians were in the World Trade Center complex at the time of the attacks, while turnstile counts from the Port Authority suggest that 14,154 people were typically in the Twin Towers by 8:45 a.m.[50][51] The vast majority of people below the impact zone safely evacuated the buildings, along with 18 people who were in the impact zone in the south tower and a number above the impact zone who evidently used the one intact stairwell in the south tower.[52] At least 1,366 people died who were at or above the floors of impact in the North Tower and at least 618 in the South Tower, where evacuation had begun before the second impact.[53] Thus over 90% of the workers and visitors who died in the Towers had been at or above impact.

According to the Commission Report, hundreds were killed instantly by the impact, while the rest were trapped and died after tower collapse.[54] At least 200 people jumped to their deaths from the burning towers (as depicted in the photograph "The Falling Man"), landing on the streets and rooftops of adjacent buildings hundreds of feet below.[55] Some of the occupants of each tower above its point of impact made their way upward toward the roof in hope of helicopter rescue, but the roof access doors were locked. No plan existed for helicopter rescues, and on September 11, the thick smoke and intense heat would have prevented helicopters from conducting rescues.[56]

 

A total of 411 emergency workers who responded to the scene died as they attempted to rescue people and fight fires. The New York City Fire Department (FDNY) lost 341 firefighters and 2 FDNY paramedics.[57] The New York City Police Department lost 23 officers.[58] The Port Authority Police Department lost 37 officers,[59] and 8 additional EMTs and paramedics from private EMS units were killed.[60][61]

Cantor Fitzgerald L.P., an investment bank on the 101st–105th floors of One World Trade Center, lost 658 employees, considerably more than any other employer.[62]Marsh Inc., located immediately below Cantor Fitzgerald on floors 93–101 (the location of Flight 11's impact), lost 355 employees, and 175 employees of Aon Corporation were killed.[63] After New York, New Jersey was the hardest hit state, with the city of Hoboken sustaining the most deaths.[64]

Weeks after the attack, the number of deaths was estimated to be over 6,000,[65] but this turned out to be more than twice the number of actual confirmed dead. The city was only able to identify remains for about 1,600 of the victims at the World Trade Center. The medical examiner's office also collected "about 10,000 unidentified bone and tissue fragments that cannot be matched to the list of the dead".[66] Bone fragments were still being found in 2006 as workers were preparing to demolish the damaged Deutsche Bank Building. That operation was completed in 2007. On April 2, 2010 a team of anthropology and archaeological experts began searching for human remains, human artifacts and personal items at the Fresh Kills Landfill on Staten Island. The operation was completed in June 2010 with 72 human remains found, bringing the total human remains found to 1,845. The identities of 1,629 of the 2,753 victims[67] have been identified. DNA profiling in an attempt to identify additional victims is continuing.[68]

 

Damage

Along with the 110-floor Twin Towers of the World Trade Center itself, numerous other buildings at the World Trade Center site were destroyed or badly damaged, including 7 World Trade Center, 6 World Trade Center, 5 World Trade Center, 4 World Trade Center, the Marriott World Trade Center (3 WTC), and the World Financial Center complex and St. Nicholas Greek Orthodox Church.[69] The fall of the Twin Towers represented the only examples of total progressive collapse of steel-framed structures in history.[70]

 

The Deutsche Bank Building across Liberty Street from the World Trade Center complex was later condemned due to the uninhabitable, toxic conditions inside the office tower, and is undergoing deconstruction.[71][72] The Borough of Manhattan Community College's Fiterman Hall at 30 West Broadway was also condemned due to extensive damage in the attacks, and is slated for deconstruction.[73]

Other neighboring buildings including 90 West Street and the Verizon Building suffered major damage, but have since been restored.[74]World Financial Center buildings, One Liberty Plaza, the Millenium Hilton, and 90 Church Street had moderate damage.[75] They have since been restored. Communications equipment on top of the North Tower, including broadcast radio, television and two-way radio antenna towers, was also destroyed, but media stations were quickly able to reroute signals and resume broadcasts.[69][76] In Arlington County, a portion of the Pentagon was severely damaged by fire and one section of the building collapsed.[77]

 

Rescue and recovery

 

The Fire Department of New York City (FDNY) quickly deployed 200 units (half of the department) to the site, whose efforts were supplemented by numerous off-duty firefighters and EMTs.[78][79][80] The New York Police Department (NYPD) sent Emergency Service Units (ESU) and other police personnel, along with deploying its aviation unit.[81] Once on the scene, the FDNY, NYPD, and Port Authority police did not coordinate efforts,[78] and ended up performing redundant searches for civilians.[82]

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.[81][82] With separate command posts set up and incompatible radio communications between the agencies, warnings were not passed along to FDNY commanders.

After the first tower collapsed, FDNY commanders did issue evacuation warnings, however, due to technical difficulties with malfunctioning radio repeater systems, many firefighters never heard the evacuation orders. 9-1-1 dispatchers also received information from callers that was not passed along to commanders on the scene.[79] Within hours of the attack, a substantial search and rescue operation was launched. After months of around-the-clock operations, the World Trade Center site was cleared by the end of May 2002.[83]

 

Attackers and their background

Within hours of the attacks, the FBI was able to determine the names and in many cases the personal details of the suspected pilots and hijackers.[84][85]Mohamed Atta, from Egypt, was the ringleader of the 19 hijackers and one of the pilots.[86] Atta died in the attack along with the other hijackers, but his luggage, which did not make the connection from his Portland flight onto Flight 11, contained papers that revealed the identities of all 19 hijackers and other important clues about their plans, motives, and backgrounds.[87] By midday, the National Security Agency had intercepted communications that pointed to Osama bin Laden, as did German intelligence agencies.[88][89]

On September 27, 2001, the FBI released photos of the 19 hijackers, along with information about the possible nationalities and aliases of many.[90] Fifteen of the hijackers were from Saudi Arabia, two from the United Arab Emirates, one from Egypt (Atta), and one from Lebanon.[91]

The FBI investigation into the attacks, code named operation PENTTBOM, was the largest and most complex investigation in the history of the FBI, involving over 7,000 special agents.[92] The United States government determined that al-Qaeda, headed by Osama bin Laden, bore responsibility for the attacks, with the FBI stating "evidence linking al-Qaeda and bin Laden to the attacks of September 11 is clear and irrefutable".[93] The Government of the United Kingdom reached the same conclusion regarding al-Qaeda and Osama bin Laden's culpability for the 11 September attacks.[94]

Author Laurie Mylroie, writing in the conservative political magazine The American Spectator in 2006, argues that Khalid Sheikh Mohammed and his family are the primary architects of 9/11 and similar attacks, and that Khalid Sheikh Mohammed's association with Osama bin Laden is secondary and that al-Qaeda's claim of responsibility for the attack is after the fact and opportunistic.[95] Angelo Codevilla, of the same magazine, agrees with Mylroie, comparing Osama bin Laden to Elvis Presley.[96] In an opposing point of view, former CIA officer Robert Baer, writing in Time magazine in 2007, asserts that George W. Bush Administration's publicizing of Khalid Sheikh Mohammed's claims of responsibility for 9/11 and numerous other acts was a mendacious attempt to claim that all of the significant actors in 9/11 had been caught.[97]

 

Al-Qaeda

The origins of al-Qaeda can be traced back to 1979 when the Soviet Union invaded Afghanistan. Soon after the invasion, Osama bin Laden traveled to Afghanistan where he helped organize Arab mujahideen and established the Maktab al-Khidamat (MAK) organization to resist the Soviets. During the war with the Soviet Union, Bin Laden and his fighters received American and Saudi funding, with American and most Saudi funds funneled through the ISI, Pakistan's intelligence service.[98] In 1989, as the Soviets withdrew, MAK was transformed into a "rapid reaction force" in jihad against governments across the Muslim world. Under the guidance of Ayman al-Zawahiri, Osama bin Laden became more radical.[99] In 1996, bin Laden issued his first fatwā, which called for American soldiers to leave Saudi Arabia.[100]

In a second fatwā issued in 1998, bin Laden outlined his objections to American foreign policy towards Israel, as well as the continued presence of American troops in Saudi Arabia after the Gulf War.[101] Bin Laden used Islamic texts to exhort violent action against American military and citizenry until the stated grievances are reversed, noting "ulema have throughout Islamic history unanimously agreed that the jihad is an individual duty if the enemy destroys the Muslim countries."[101]

 

Planning of the attacks

The idea for the September 11 plot came from Khalid Sheikh Mohammed, who first presented the idea to Osama bin Laden in 1996.[102] At that point, Bin Laden and al-Qaeda were in a period of transition, having just relocated back to Afghanistan from Sudan.[103] The 1998 African Embassy bombings and Bin Laden's 1998 fatwā marked a turning point, with bin Laden intent on attacking the United States.[103] In December 1998, the Director of Central Intelligence Counterterrorist Center reported to President Bill Clinton that al-Qaeda was preparing for attacks in the USA, including the training of personnel to hijack aircraft.[104]

In late 1998 or early 1999, bin Laden gave approval for Mohammed to go forward with organizing the plot. A series of meetings occurred in spring of 1999, involving Khalid Sheikh Mohammed, Osama bin Laden, and his deputy Mohammed Atef.[103] Mohammed provided operational support for the plot, including target selections and helping arrange travel for the hijackers.[103] Bin Laden overruled Mohammed, rejecting some potential targets such as the U.S. Bank Tower in Los Angeles[105] because "there was not enough time to prepare for such an operation".[106]

Bin Laden provided leadership for the plot, along with financial support, and was involved in selecting participants for the plot.[107] Bin Laden initially selected Nawaf al-Hazmi and Khalid al-Mihdhar, both experienced jihadists who fought in Bosnia. Hazmi and Mihdhar arrived in the United States in mid-January 2000, after traveling to Malaysia to attend the Kuala Lumpur al-Qaeda Summit. In spring 2000, Hazmi and Mihdhar took flying lessons in San Diego, California, but both spoke little English, did not do well with flying lessons, and eventually served as "muscle" hijackers.[108][109]

In late 1999, a group of men from Hamburg, Germany arrived in Afghanistan, including Mohamed Atta, Marwan al-Shehhi, Ziad Jarrah, and Ramzi Binalshibh.[110] Bin Laden selected these men for the plot, as they were educated, could speak English, and had experience living in the west.[111] New recruits were routinely screened for special skills, which allowed Al Qaeda leaders to also identify Hani Hanjour, who already had a commercial pilot's license, for the plot.[112]

Hanjour arrived in San Diego on December 8, 2000, joining Hazmi. They soon left for Arizona, where Hanjour took refresher training. Marwan al-Shehhi arrived at the end of May 2000, while Atta arrived on June 3, 2000, and Jarrah arrived on June 27, 2000. Binalshibh 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 and remain as an illegal immigrant. Binalshibh remained in Hamburg, providing coordination between Atta and Khalid Sheikh Mohammed. The three Hamburg cell members all took pilot training in south Florida.

In spring 2001, the muscle hijackers began arriving in the United States.[113] In July 2001, Atta met with Binalshibh in Spain, where they coordinated details of the plot, including final target selection. Binalshibh also passed along Bin Laden's wish for the attacks to be carried out as soon as possible.[114]

 

Osama bin Laden

 

Osama bin Laden's declaration of a holy war against the United States, and a fatwā signed by bin Laden and others calling for the killing of American civilians in 1998, are seen by investigators as evidence of his motivation to commit such acts.[115]

Bin Laden initially denied, but later admitted, involvement in the incidents.[1][116] On September 16, 2001, bin Laden denied any involvement with the attacks by reading a statement which was broadcast by Qatar's Al Jazeera satellite channel: "I stress that I have not carried out this act, which appears to have been carried out by individuals with their own motivation."[117] This denial was broadcast on U.S. news networks and worldwide.

In November 2001, U.S. forces recovered a videotape from a destroyed house in Jalalabad, Afghanistan, in which Osama bin Laden is talking to Khaled al-Harbi. In the tape, bin Laden admits foreknowledge of the attacks.[118] The tape was broadcast on various news networks from December 13, 2001. His distorted appearance on the tape has been attributed to tape transfer artifact.[119] The detailed timeline of Bin Laden's having prior knowledge were revealed in a September 2002 interview documentary-maker Yosri Fouda conducted with Khalid Sheikh Mohammed and Ramzi Binalshibh: the decision to launch a "martyrdom operation inside America" was made by Al Qaeda's military committee in early 1999; Atta, after deciding on the date (9/11/01) for the attacks, informed Binalshibh of this date on August 29, 2001, and Bin Laden was given this information on September 6, 2001.[120]

On December 27, 2001, a second bin Laden video was released. In the video, he states, "Terrorism against America deserves to be praised because it was a response to injustice, aimed at forcing America to stop its support for Israel, which kills our people", but he stopped short of admitting responsibility for the attacks.[121]

Shortly before the U.S. presidential election in 2004, in a taped statement, bin Laden publicly acknowledged al-Qaeda's involvement in the attacks on the U.S. and admitted his direct link to the attacks. He said that the attacks were carried out because "we are free...and want to regain freedom for our nation. As you undermine our security we undermine yours."[122] Osama bin Laden says he had personally directed his followers to attack the World Trade Center[123][116] Another video obtained by Al Jazeera in September 2006 shows Osama bin Laden with Ramzi Binalshibh, as well as two hijackers, Hamza al-Ghamdi and Wail al-Shehri, as they make preparations for the attacks.[124]

 

Khalid Sheikh Mohammed

 

The journalist Yosri Fouda of the Arabic television channel Al Jazeera reported that in April 2002, Khalid Sheikh Mohammed admitted his involvement, along with Ramzi Binalshibh, in the "Holy Tuesday operation".[125][126][127] The 9/11 Commission Report determined that the animosity towards the United States felt by Khalid Sheikh Mohammed, the "principal architect" of the 9/11 attacks, stemmed "not from his experiences there as a student, but rather from his violent disagreement with U.S. foreign policy favoring Israel".[103]

Mohamed Atta shared this motivation. Ralph Bodenstein, a former classmate of Atta described him as "most imbued actually about... U.S. protection of these Israeli politics in the region".[128]Abdulaziz al-Omari, a hijacker aboard Flight 11 with Mohamed Atta, said in his video will, "My work is a message those who heard me and to all those who saw me at the same time it is a message to the infidels that you should leave the Arabian peninsula defeated and stop giving a hand of help to the coward Jews in Palestine."[129]

Khalid Sheikh Mohammed was also an adviser and financier of the 1993 World Trade Center bombing. He is also the uncle of Ramzi Yousef, the lead bomber in that attack.

Khalid Sheikh Mohammed was arrested on March 1, 2003 in Rawalpindi, Pakistan by Pakistani security officials working with the CIA, and is currently being held at Guantanamo Bay.[130] During U.S. hearings in March 2007 Sheikh Mohammed again confessed his responsibility for the attacks, saying "I was responsible for the 9/11 operation, from A to Z."[127][131] Mohammed made the confession after being subject to waterboarding.[132] In November 2009, U.S. Attorney General Eric Holder announced that Mohammed and four accused co-conspirators will be transferred from Guantanamo Bay, Cuba to stand trial in civilian court near Ground Zero in New York. No trial date was given. Holder expressed confidence that the defendants would get a fair trial that was "open to the public and open to the world".[133]

 

Other al-Qaeda members

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. They are Osama bin Laden, Khalid Sheikh Mohammed, Ramzi Binalshibh, Abu Turab al-Urduni and Mohammed Atef.[134] To date, only peripheral figures have been tried or convicted for the attacks. Bin Laden has not yet been formally indicted for the attacks.[135]

On September 26, 2005, the Spanish high court directed by judge Baltasar Garzón sentenced Abu Dahdah to 27 years of imprisonment for conspiracy on the 9/11 attacks and being a member of the terrorist organization al-Qaeda. At the same time, another 17 al-Qaeda members were sentenced to penalties of between six and eleven years.[136][137] 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.[138]

 

Motives

The motives for the attacks include the presence of the U.S. in Saudi Arabia,[139] the support of Israel by the U.S.,[140] and the sanctions against Iraq.[141] These motives were explicitly stated by Al-Qaeda in proclamations before the attacks, including the fatwā of August 1996,[142] and a shorter fatwā published in February 1998.[143] After the attacks, bin Laden and al-Zawahiri published additional video tapes and audio tapes, some of which repeated those reasons for the attacks. Two particularly important publications were bin Laden's 2002 "Letter to America",[144] and a 2004 video tape by bin Laden.[145] In addition to direct pronouncements by bin Laden and Al-Qaeda, numerous political analysts have postulated motivations for the attacks.

The continued presence of U.S. troops after the Gulf War in Saudi Arabia was one of the stated motivations behind the September 11th terrorist attacks,[143] the Khobar Towers bombing, as well, the date chosen for the 1998 United States embassy bombings (August 7), was eight years to the day that American troops were sent to Saudi Arabia.[146] Bin Laden interpreted the Prophet Muhammad as banning the "permanent presence of infidels in Arabia".[147] In 1996, Bin Laden issued a fatwā, calling for American troops to get out of Saudi Arabia. In the 1998 fatwā, 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."[148] In the December 1999 interview with Rahimullah Yusufzai, bin Laden said he felt that Americans were "too near to Mecca" and considered this a provocation to the entire Muslim world.[149]

In his November 2002 "Letter to America", Bin Laden described the United States' support of Israel as a motivation: "The creation and continuation of Israel is one of the greatest crimes, and you are the leaders of its criminals. And of course there is no need to explain and prove the degree of American support for Israel. The creation of Israel is a crime which must be erased. Each and every person whose hands have become polluted in the contribution towards this crime must pay its price, and pay for it heavily."[150] In 2004 and 2010, Bin Laden again repeated the connection between the September 11 attacks and the support of Israel by the United States.[151][152][153] Several analysts, including Mearsheimer and Walt, also claim a motivation for the attacks was the support of Israel by the United States.[149][154]

In the 1998 fatwā, Al Qaeda identified the Iraq sanctions as a reason to kill Americans: "despite the great devastation inflicted on the Iraqi people by the crusader-Zionist alliance, and despite the huge number of those killed, which has exceeded 1 million... despite all this, the Americans are once against trying to repeat the horrific massacres, as though they are not content with the protracted blockade imposed after the ferocious war or the fragmentation and devastation....On that basis, and in compliance with Allah's order, we issue the following fatwā to all Muslims: The ruling to kill the Americans and their allies—civilians and military—is an individual duty for every Muslim..."[148]

In addition to the motives published by Al Qaeda, analysts have suggested other motives, including humiliation resulting from the Islamic world falling behind the Western world - this discrepancy made especially visible due to recent globalisation.[155][156] Another speculated motive was the desire to provoke the U.S. into a broader war against the Islamic world, with the hope of motivating more allies to support Al Qaeda.[157]

 

Aftermath

 

Immediate response

The 9/11 attacks had immediate and overwhelming effects upon the American people.[158] Many police officers and rescue workers elsewhere in the country took leaves of absence to travel to New York City to assist in the process of recovering bodies from the twisted remnants of the Twin Towers.[159]Blood donations across the U.S. also saw a surge in the weeks after 9/11.[160][161]

Over 3000 children were left without one or more parents.[162] Children's reactions both to these actual losses, yet also to feared losses of life and a protective environment in the aftermath of the attacks are well-documented, as were their effects on surviving caregivers.[163][164][165]

For the first time in history, SCATANA was invoked forcing all non-emergency civilian aircraft in the United States and several other countries including Canada to be immediately grounded,[166] stranding tens of thousands of passengers across the world.[167] Any international flights were closed to American airspace by the Federal Aviation Administration, causing about five hundred flights to be turned back or redirected to other countries. Canada received 226 of the diverted flights and launched Operation Yellow Ribbon to deal with the large numbers of grounded planes and stranded passengers.[168]

 

Military operations following the attacks

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, according to notes taken by senior policy official Stephen Cambone. "Best info fast. Judge whether good enough hit S.H." — meaning Saddam Hussein — "at same time. Not only UBL" (Osama bin Laden), Cambone's notes quoted Rumsfeld as saying. "Need to move swiftly — Near term target needs — go massive — sweep it all up. Things related and not."[169][170]

The NATO council declared that the attacks on the United States were considered an attack on all NATO nations and, as such, satisfied Article 5 of the NATO charter.[171] Upon returning to Australia having been on an official visit to the U.S. at the time of the attacks, Australian Prime Minister John Howard invoked Article IV of the ANZUS treaty. In the immediate aftermath of the attacks, the Bush administration announced a war on terror, with the stated goals of bringing Osama bin Laden and al-Qaeda to justice and preventing the emergence of other terrorist networks. These goals would be accomplished by means including economic and military sanctions against states perceived as harboring terrorists and increasing global surveillance and intelligence sharing.

The second-biggest operation of the U.S. Global War on Terrorism outside of the United States, and the largest directly connected to terrorism, was the overthrow of the Taliban rule of Afghanistan by a U.S.-led coalition. The United States was not the only nation to increase its military readiness, with other notable examples being the Philippines and Indonesia, countries that have their own internal conflicts with Islamic terrorism.[172][173]

 

Domestic response

 

Following the attacks, President Bush's job approval rating soared to 90%.[174] On September 20, 2001, the U.S. president spoke before the nation and a joint session of the United States Congress, regarding the events of that day, the intervening nine days of rescue and recovery efforts, and his intent in response to those events. In addition, the highly visible role played by New York City mayor Rudy Giuliani won him high praise nationally and in New York.[175]

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, such as the Coalition of 9/11 Families. By the deadline for victim's compensation, September 11, 2003, 2,833 applications had been received from the families of those who were killed.[176]

 

Contingency plans for the continuity of government and the evacuation of leaders were also implemented almost immediately after the attacks.[167] Congress, however, was not told that the United States was under a continuity of government status until February 2002.[177]

Within the United States, Congress passed and President Bush signed the Homeland Security Act of 2002, creating the Department of Homeland Security, representing the largest restructuring of the U.S. government in contemporary history. Congress also passed the USA PATRIOT Act, stating that it would help detect and prosecute terrorism and other crimes.[178]

Civil liberties groups have criticized the PATRIOT Act, saying that it allows law enforcement to invade the privacy of citizens and eliminates judicial oversight of law-enforcement and domestic intelligence gathering.[179][180][181] The Bush Administration also invoked 9/11 as the reason to initiate a secret National Security Agency operation, "to eavesdrop on telephone and e-mail communications between the United States and people overseas without a warrant".[182]

 

Hate crimes

Numerous incidents of harassment and hate crimes were reported against Middle Easterners and other "Middle Eastern-looking" people in the days following the 9/11 attacks.[183][184]Sikhs were also targeted because Sikh males usually wear turbans, which are stereotypically associated with Muslims. There were reports of verbal abuse, attacks on mosques and other religious buildings (including the firebombing of a Hindu temple and assaults on people, including one murder: Balbir Singh Sodhi was fatally shot on September 15, 2001. He, like others, was a Sikh who was mistaken for a Muslim.[183])

According to a study by Ball State University, people perceived to be Middle Eastern were as likely to be victims of hate crimes as followers of Islam during this time. The study also found a similar increase in hate crimes against people who may have been perceived as members of Islam, Arabs and others thought to be of Middle Eastern origin.[185]

A report by South Asian American advocacy group SAALT documented media coverage of 645 bias incidents against Americans of South Asian or Middle Eastern descent between September 11 and September 17, including vandalism, arson, assault, shootings, harassment, and threats.[186][187]

 

Muslim American reaction

Top Muslim organizations in the United States were swift to condemn the attacks on 9/11 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".[188] Top 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. Along with monetary donations, many Islamic organizations launched blood drives and provided medical assistance, food, and shelter for victims.[189][190][191]

 

International response

 

The attacks were denounced by mass media and governments worldwide. Across the globe, nations offered pro-American support and solidarity.[192] Leaders in most Middle Eastern countries, and Afghanistan, condemned the attacks. Iraq was a notable exception, with an immediate official statement that "the American cowboys are reaping the fruit of their crimes against humanity".[193]

Tens of thousands of people attempted to flee Afghanistan following the attacks, fearing a response by the United States. Pakistan, already home to many Afghan refugees from previous Afghan conflict, closed its border with Afghanistan on September 17. Approximately one month after the attacks, the United States led a broad coalition of international forces in the removal of the Taliban regime for harboring the al-Qaeda organization.[194]Pakistani authorities moved reluctantly[195] to align themselves with the United States in a war against the Taliban. Pakistan provided the United States a number of military airports and bases for its attack on the Taliban regime and arrested over 600 suspected al-Qaeda members, whom it handed over to the United States.[196]

Numerous countries, including Canada, China, the United Kingdom, France, Russia, Germany, India and Pakistan introduced anti-terrorism legislation and froze the bank accounts of businesses and individuals they suspected of having al-Qaeda ties.[197][198] Law enforcement and intelligence agencies in a number of countries, including Italy, Malaysia, Indonesia, and the Philippines arrested people they labeled terrorist suspects for the stated purpose of breaking up militant cells around the world.[199][200]

In the U.S., this aroused some controversy, as critics such as the Bill of Rights Defense Committee argued that traditional restrictions on federal surveillance (e.g. COINTELPRO's monitoring of public meetings) were "dismantled" by the USA PATRIOT Act.[201] Organizations such as the American Civil Liberties Union and Liberty argued that certain civil rights protections were also being circumvented.[202][203]

The United States set up a detention center at Guantánamo Bay, Cuba to hold inmates they defined as "illegal enemy combatants". The legitimacy of these detentions has been questioned by, among others, the European Parliament, the Organization of American States, and Amnesty International.[204][205][206]

The international events and reactions immediately after the attacks affected the impact of the World Conference against Racism 2001, which had ended in discord and international recriminations just three days before.[207]

As in the United States, the aftermath of the attacks saw tensions increase in other countries between Muslims and non-Muslims.[208]

 

Conspiracy theories

Conspiracy theorists question the accepted version of the attacks, the motivations behind them, and the parties involved. Some of the conspiracy theories see the attacks as a casus belli through a false flag to bring about increased militarization and police power.

Some proponents of 9/11 conspiracy theories have speculated that individuals inside the United States possessed detailed information about the attacks and deliberately chose not to prevent them, or that individuals outside of al-Qaeda planned, carried out, or assisted in the attacks. Some conspiracy theorists claim the World Trade Center did not collapse because of the crashing planes but was instead demolished with explosives. This controlled demolition hypothesis is rejected by the National Institute of Standards and Technology, who, after their research, concluded that the impacts of jets at high speeds in combination with subsequent fires caused the collapse of both Towers.[209][210]