September 11 attacks

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 . 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. The death toll of the attacks was 2,995, including the 19 hijackers. The overwhelming majority of casualties were civilians, including nationals of over 70 countries. In addition, there is 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 World Trade Center's collapse. The United States responded to the attacks by launching the War on Terrorism . It invaded Afghanistan to depose the Taliban , who had harbored al-Qaeda terrorists. The United States also enacted 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 . 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 one of the tallest buildings 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. The Security Council today, following what it called yesterday's "horrifying terrorist attacks" in New York, Washington, D.C., and Pennsylvania, unequivocally condemned those acts, and expressed its deepest sympathy and condolences to the victims and their families and to the people and Government of the United States. "A list of the 77 countries whose citizens died as a result of the attacks on September 11, 2001" (Document). Ground broken for Flight 93 memorial in Pa.

The September 11 attacks (also referred to as September 11 , September 11th , or 9/11 ) were a series of four coordinated terrorist attacks by the Islamic terrorist group al-Qaeda on the United States in New York City , New York , and Arlington County , Virginia , on the morning of Tuesday, September 11, 2001. Four passenger airliners which all departed from the U.S. East Coast to California were hijacked by 19 al-Qaeda terrorists to be flown into buildings in suicide attacks . Two of the planes, American Airlines Flight 11 and United Airlines Flight 175 , were crashed into the North and South towers, respectively, of the World Trade Center complex in New York City. Within two hours, both 110-story towers collapsed with debris and the resulting fires causing partial or complete collapse of all other buildings in the WTC complex, including the 47-story 7 World Trade Center tower, as well as significant damage to ten other large surrounding structures. A third plane, American Airlines Flight 77 , was crashed into the Pentagon (the headquarters of the United States Department of Defense ) in Arlington County, leading to a partial collapse in its western side. The fourth plane, United Airlines Flight 93 , was targeted at Washington D.C. , but crashed into a field near Shanksville , Pennsylvania , after its passengers tried to overcome the hijackers. In total, 2,996 people died in the attacks including the 245 civilians , a law enforcement officer , and the 19 terrorists aboard the four planes. It was the deadliest incident for firefighters and law enforcement officers in the history of the United States , with 343 and 72 killed respectively. The attacks also caused at least $10 billion in property and infrastructure damage. Suspicion for the attack quickly fell on al-Qaeda. The United States responded to 9/11 by launching the War on Terror and invading Afghanistan to depose the Taliban , which had harbored al-Qaeda. Many other countries also strengthened their anti-terrorism legislation and expanded law enforcement powers. Although al-Qaeda's leader, Osama bin Laden , initially denied any involvement, in 2004, he claimed responsibility for the attacks . Al-Qaeda and bin Laden cited U.S. support of Israel , the presence of U.S. troops in Saudi Arabia , and sanctions against Iraq as motives. Having evaded capture for almost a decade, bin Laden was located and killed by members of the U.S. military in May 2011. The destruction of the Twin Towers and other properties caused serious damage to the economy of Lower Manhattan and had a significant effect on global markets, closing Wall Street until September 17 and the civilian airspace in the U.S. and Canada until September 13. Many closings, evacuations, and cancellations followed, out of respect or fear of further attacks. Cleanup of the World Trade Center site was completed in May 2002, and the Pentagon was repaired within a year. Numerous memorials have been constructed, including the National September 11 Memorial & Museum in New York City, the Pentagon Memorial in Arlington County, and the Flight 93 National Memorial in a field near Shanksville. The building was officially opened on November 3, 2014. Al-Qaeda leader Osama bin Laden appeared in a new message aired on an Arabic TV station Friday night, for the first time claiming direct responsibility for the 2001 attacks against the United States. "How much did the September 11 terrorist attack cost America?" . 2004 . Institute for the Analysis of Global Security . There are <ref group=nb> tags on this page, but the references will not show without a template (see the help page ).

Attacks against the United States on September 11, 2001 The September 11 attacks (also referred to as 9/11 ) were a series of four coordinated terrorist attacks by the Islamic terrorist group al-Qaeda against the United States on the morning of Tuesday, September 11, 2001. 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. 9/11 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. Four passenger airliners which had departed from airports in the northeastern United States bound for California were hijacked by 19 al-Qaeda terrorists . 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 . Within an hour and 42 minutes, both 110-story towers collapsed . 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. A third plane, American Airlines Flight 77 , was crashed into the Pentagon (the headquarters of the U.S. Department of Defense ) in Arlington County, Virginia , which led to a partial collapse of the building's west side. 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. 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 . Many countries strengthened their anti-terrorism legislation and expanded the powers of law enforcement and intelligence agencies to prevent terrorist attacks. Although bin Laden initially denied any involvement, in 2004 he claimed responsibility for the attacks . Al-Qaeda and bin Laden cited U.S. support of Israel , the presence of U.S. troops in Saudi Arabia , and sanctions against Iraq as motives . After evading capture for almost a decade, bin Laden was located in Pakistan in 2011 and killed during a U.S. military raid. 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. Wall Street was closed until September 17, and the U.S. and Canadian civilian airspaces until September 13. Many closings, evacuations, and cancellations followed, out of respect or fear of further attacks. Cleanup of the World Trade Center site was completed in May 2002, and the Pentagon was repaired within a year. The construction of One World Trade Center began in November 2006, and the building opened in November 2014. 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. Al-Qaeda leader Osama bin Laden appeared in a new message aired on an Arabic TV station Friday night, for the first time claiming direct responsibility for the 2001 attacks against the United States. US Counter-Terrorism Strategy and al-Qaeda: Signalling and the Terrorist World-View (Reprint ed.). Institute for the Analysis of Global Security . There are <ref group=lower-alpha> tags or templates on this page, but the references will not show without a template or template (see the help page ).

2001 Islamist terror attacks in the United States For other uses, see September 11 attacks (disambiguation) . The September 11 attacks , commonly known as 9/11 , were four coordinated Islamist suicide terrorist attacks carried out by al-Qaeda against the United States in 2001. That morning, 19 terrorists hijacked four commercial airliners scheduled to travel from the New England and Mid-Atlantic regions of the East Coast to California . The hijackers crashed the first two planes into the Twin Towers of the World Trade Center in New York City, two of the world's five tallest buildings at the time, and aimed the next two flights toward targets in or near Washington, D.C. , in an attack on the nation's capital . The third team succeeded in crashing into The Pentagon , the headquarters of the U.S. Department of Defense in Arlington County, Virginia , while the fourth plane crashed in rural Pennsylvania following a passenger revolt. The attacks killed nearly 3,000 people and instigated the multi-decade global war on terror . The first impact was that of American Airlines Flight 11 , which crashed into the North Tower of the World Trade Center complex in Lower Manhattan at 8:46 a.m. Sixteen minutes later, at 9:03, the World Trade Center's South Tower was hit by United Airlines Flight 175 . Both 110-story skyscrapers collapsed within an hour and forty-one minutes, bringing about the destruction of the remaining five structures in the WTC complex and several other nearby buildings. A third flight, American Airlines Flight 77 , crashed into The Pentagon at 9:37 a.m., causing a partial collapse. The fourth and final flight, United Airlines Flight 93 , flew in the direction of the capital. Alerted to the previous attacks, the passengers retaliated in an attempt to take control of the aircraft, forcing the hijackers to crash the plane in a Stonycreek Township field, near Indian Lake and Shanksville , at 10:03 a.m. Investigators determined that Flight 93's target was either the United States Capitol or the White House . Within hours of the attacks, the Central Intelligence Agency had determined that al-Qaeda was responsible. The United States formally responded by launching the war on terror and invading Afghanistan to depose the Taliban , which rejected the conditions of U.S. terms to expel al-Qaeda from Afghanistan and extradite its leaders. The U.S.'s invocation of Article 5 of the North Atlantic Treaty —its only usage to date—called upon allies to fight al-Qaeda. As U.S. and NATO invasion forces swept through Afghanistan, al-Qaeda leader Osama bin Laden disappeared into the White Mountains , eluding captivity by Western forces. Although bin Laden initially denied any involvement, in 2004 he formally claimed responsibility for the attacks . Al-Qaeda's cited motivations included U.S. support of Israel , the presence of U.S. military bases in Saudi Arabia and sanctions against Iraq . The nearly decade-long manhunt for bin Laden concluded on May 2, 2011, when he was killed during a U.S. military raid after being tracked down to his compound in Abbottabad , Pakistan . The war in Afghanistan continued for another eight years until the agreement was made in February 2020 for American and NATO troops to withdraw from the country , and the last members of the U.S. armed forces left the region on August 30, 2021, resulting in the return to power of the Taliban. Not including the hijackers, the attacks killed 2,977 people, injured thousands more and gave rise to substantial long-term health consequences while also causing at least $10 billion in infrastructure and property damage. It remains the deadliest terrorist act in human history as well as the single deadliest incident for both firefighters and law enforcement personnel in the history of the United States, causing the deaths of 343 and 72 members respectively. The loss of life stemming from the impact of Flight 11 secured its place as the most lethal plane crash in aviation history followed by the death toll incurred by Flight 175. The destruction of the World Trade Center and its environs seriously harmed the U.S. economy and induced global market shocks . Many other countries strengthened anti-terrorism legislation and expanded their powers of law enforcement and intelligence agencies . Cleanup of the World Trade Center site (colloquially "Ground Zero") took eight months and was completed in May 2002, while The Pentagon was repaired within a year. After delays in the design of a replacement complex, construction of the One World Trade Center began in November 2006; it opened in November 2014. Memorials to the attacks include 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. There are <ref group=lower-alpha> tags or templates on this page, but the references will not show without a template or template (see the help page ).

2001 Islamist terror attacks in the U.S. The September 11 attacks , also known as 9/11 , were four coordinated Islamist terrorist suicide attacks by al-Qaeda against the United States in 2001. Nineteen terrorists hijacked four commercial airliners, crashing the first two into the Twin Towers of the World Trade Center in New York City and the third into the Pentagon (headquarters of the U.S. Department of Defense ) in Arlington County, Virginia . The fourth plane crashed in a rural Pennsylvania field during a passenger revolt. The attacks killed 2,977 people, making it the deadliest terrorist attack in history. In response to the attacks, the United States waged the global war on terror over multiple decades to eliminate hostile groups deemed terrorist organizations, as well as the foreign governments purported to support them. Seventeen minutes later at 9:03 a.m., United Airlines Flight 175 hit the South Tower . Both collapsed within an hour and forty-two minutes, destroying the remaining five structures in the complex. American Airlines Flight 77 crashed into the Pentagon at 9:37 a.m., causing a partial collapse. The fourth and final flight, United Airlines Flight 93 , was believed by investigators to target either the United States Capitol or the White House . Alerted to the previous attacks, the passengers revolted against the hijackers who crashed the aircraft into a field near Shanksville, Pennsylvania , at 10:03 a.m. The Federal Aviation Administration ordered an indefinite ground stop for all air traffic in U.S. airspace, preventing any further aircraft departures until September 13 and requiring all airborne aircraft to return to their point of origin or divert to Canada. The actions undertaken in Canada to support incoming aircraft and their occupants were collectively titled Operation Yellow Ribbon . Bush that its Counterterrorism Center had identified the attacks as having been the work of al-Qaeda under Osama bin Laden . The United States responded by launching the war on terror and invading Afghanistan to depose the Taliban , which rejected U.S. terms to expel al-Qaeda from Afghanistan and extradite its leaders. NATO's invocation of Article 5 of the North Atlantic Treaty —its only usage to date—called upon allies to fight al-Qaeda. As U.S. and allied invasion forces swept through Afghanistan, bin Laden eluded them . He denied any involvement until 2004, when excerpts of a taped statement in which he accepted responsibility for the attacks were released. Al-Qaeda's cited motivations included U.S. support of Israel , the presence of U.S. military bases in Saudi Arabia and sanctions against Iraq . The nearly decade-long manhunt for bin Laden concluded in May 2011, when he was killed during a U.S. military raid on his compound in Abbottabad , Pakistan. The War in Afghanistan continued for another eight years until the agreement was made in February 2020 for American and NATO troops to withdraw from the country . The attacks killed 2,977 people, injured thousands more and gave rise to substantial long-term health consequences while also causing at least $10 billion in infrastructure and property damage. It remains the deadliest terrorist attack in history as well as the deadliest incident for firefighters and law enforcement personnel in American history, killing 343 and 72 members, respectively. The loss of life stemming from the impact of Flight 11 made it the most lethal multi-plane crash in aviation history followed by the death toll incurred by Flight 175. The destruction of the World Trade Center and its environs seriously harmed the U.S. economy and induced global market shocks . Many other countries strengthened anti-terrorism legislation and expanded their powers of law enforcement and intelligence agencies . The total number of deaths caused by the attacks, combined with the death tolls from the conflicts they directly incited, has been estimated by the Costs of War Project to be over 4.5 million. Cleanup of the World Trade Center site (colloquially "Ground Zero") was completed in May 2002, while the Pentagon was repaired within a year. After delays in the design of a replacement complex, six new buildings were planned to replace the lost towers, along with a museum and memorial dedicated to those who were killed or injured in the attacks. The tallest building, One World Trade Center , began construction in 2006, opening in 2014. Memorials to the attacks include 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. There are <ref group=lower-alpha> tags or templates on this page, but the references will not show without a template or template (see the help page ). "First responder deaths from post-9/11 illnesses nearly equals number of firefighters who died that day" . Forbidden Words: Taboo and the Censoring of Language .