
The September 11 attacks transformed the first term of President George W. Bush and led to what he has called the war on terror. The accuracy of describing it as a "war" and its political motivations and consequences are the topic of strenuous debate. The U.S. government increased military operations, economic measures and political pressure on groups which it accused of being terrorists, as well as increasing pressure on the governments and countries which were accused of sheltering them. October 2001 saw the first military action initiated by the US. Under this policy, the NATO invaded Afghanistan in order to remove the Taliban regime and capture al-Qaeda forces.

The 2001 World Series was the championship series of Major League Baseball's (MLB) 2001 season. The 97th edition of the World Series, it was a best-of-seven playoff between the National League (NL) champion Arizona Diamondbacks and the three-time defending World Series champions and American League (AL) champion New York Yankees. The Diamondbacks defeated the Yankees, four games to three to win the series. Considered one of the greatest World Series of all time, its memorable aspects included two extra-inning games and three late-inning comebacks. Diamondbacks pitchers Randy Johnson and Curt Schilling were both named World Series Most Valuable Players.

The 34th Ryder Cup Matches were held 27–29 September 2002 in England, on the Brabazon Course at The Belfry in Wishaw, Warwickshire.

America: A Tribute to Heroes was a benefit concert created by the heads of the four major American broadcast networks; Fox, ABC, NBC and CBS. Joel Gallen was selected by them to produce and run the show. Actor George Clooney organised celebrities to perform and to staff the telephone bank.

On October 29, 2004, at 21:00 UTC, al Jazeera broadcast excerpts allegedly from a videotape of Osama bin Laden addressing the people of the United States; in this video, he accepts responsibility for the September 11 attacks, condemns the Bush government's response to those attacks, and presents those attacks as part of a campaign of revenge and deterrence motivated by his witnessing of the destruction in the Lebanese Civil War in 1982. News analysts speculated that the release of the video was timed to influence the 2004 U.S. presidential election, which would take place four days later.

The September 11th Victim Compensation Fund (VCF) was created by an Act of Congress, the Air Transportation Safety and System Stabilization Act, shortly after 9/11 to compensate the victims of the attack in exchange for their agreement not to sue the airline corporations involved. Kenneth Feinberg was appointed by Attorney General John Ashcroft to be special master of the fund. He developed the regulations governing the administration of the fund and administered all aspects of the program. Legislation authorizes the fund to disburse a maximum of $7.375 billion, including operational and administrative costs, of U.S. government funds.

The Great Derangement: A Terrifying True Story of War, Politics, and Religion at the Twilight of the American Empire is a 2008 non-fiction book by Matt Taibbi, published by Spiegel & Grau on May 6, 2008.

Park51 is a development that was originally envisioned as a 13-story Islamic community center and mosque in Lower Manhattan, New York City. The developers hoped to promote an interfaith dialogue within the greater community. Due to its proposed location two blocks from the World Trade Center site of the September 11 attacks which were perpetrated by Al-Qaeda, the proposed building was widely and controversially referred to as the "Ground Zero mosque".

There has been growing concern over the health effects arising from the September 11 attacks in the Financial District of Lower Manhattan. Within seconds of the collapse of the World Trade Center, building materials, electronic equipment, and furniture were pulverized and spread over the area.

Laden VS USA is a LCD handheld electronic game supposedly created by Chinese company Panyu Gaming Electronic Co. Ltd.. It is unknown if the company actually manufactured the game due to mass counterfeiting in China. Laden VS USA was also released in two different designs. The game is based on the 9/11 attacks and features pictures of the actual wreckage on the packaging. Laden VS USA also bears the marks of "Made in China" and "Ages 5 and Up" on the packaging.

Liberty Park is a one-acre (4,000 m2) elevated public park at the World Trade Center in Manhattan, New York City, overlooking the National September 11 Memorial & Museum in Lower Manhattan. The park, which opened on June 29, 2016, is located above the World Trade Center's Vehicular Security Center. The St. Nicholas National Shrine is located within the park, as well as The Sphere, the iconic sculpture salvaged from the World Trade Center site. Another statue, America's Response Monument, is also located in the park.

Following the September 11 attacks in New York City, more than 500,000 people were unable to leave Lower Manhattan due to the closure of bridges and tunnels throughout the city. Within minutes of the first plane hitting the first tower, multiple fireboats from the New York City Fire Department rushed the scene. The United States Coast Guard coordinated a large convoy of merchant ships, tugboats, and ferries to evacuate the stranded and injured victims.

The first memorials to the victims of the September 11 attacks in 2001 began to take shape online, as hundreds of webmasters posted their own thoughts, links to the Red Cross and other rescue agencies, photos, and eyewitness accounts. Numerous online September 11 memorials began appearing a few hours after the attacks, although many of these memorials were only temporary. Around the world, U.S. embassies and consulates became makeshift memorials as people came out to pay their respects.

The National Explosives Detection Canine Team Program is a program administered by the Transportation Security Administration which uses law enforcement and TSA-run explosive detection dog teams to detect explosives in transportation environments.

The New York Rescue Workers Detoxification Project was founded in New York City in 2003 with the stated purpose of treating rescue workers for toxins inhaled from the smoke of the September 11 attacks. It has two clinics: Downtown Medical on Fulton Street, two blocks from the site of the World Trade Center, and another at Williston Park, Long Island. The project's co-founder and top fundraiser is the actor Tom Cruise. It uses the Purification Rundown, a "detoxification" program invented by L. Ron Hubbard as part of Scientology's Bridge to Total Freedom. This rundown has been criticized by many doctors as pseudoscientific and medically dangerous. It was reported in October 2007 that 838 people had completed the program.

Operation Noble Eagle (ONE) is the United States and Canadian military operation related to homeland security and support to federal, state, and local agencies. The operation began 14 September 2001, in response to the September 11 attacks.

Non-Stop is a 2014 American action thriller film directed by Jaume Collet-Serra and starring Liam Neeson and Julianne Moore. It follows a Federal Air Marshal who must find a killer on an international flight after receiving texts saying someone on board will be executed every 20 minutes until financial demands are met. The film marks the second collaboration between Jaume Collet-Serra and Liam Neeson after Unknown.

Operation Yellow Ribbon was commenced by Canada to handle the diversion of civilian airline flights in response to the September 11 attacks in 2001 on the United States. Canada's goal was to ensure that potentially destructive air traffic be removed from United States airspace as quickly as possible, and away from potential U.S. targets, and instead place these aircraft on the ground in Canada, at military and civilian airports primarily in the Canadian provinces of Nova Scotia, Newfoundland and Labrador, and British Columbia. Yukon, New Brunswick, Alberta, Manitoba, Ontario, Northwest Territories, and Quebec also took in aircraft so that any malicious or destructive potential could be better contained and neutralized. None of the aircraft proved to be a threat, and Canada hosted thousands of passengers who were stranded until U.S. airspace was reopened.

Park51 is a development that was originally envisioned as a 13-story Islamic community center and mosque in Lower Manhattan, New York City. The developers hoped to promote an interfaith dialogue within the greater community. Due to its proposed location two blocks from the World Trade Center site of the September 11 attacks which were perpetrated by Al-Qaeda, the proposed building was widely and controversially referred to as the "Ground Zero mosque".

Ross Andrew Parker, from Peterborough, England, UK, was a seventeen-year-old White English male murdered in an unprovoked racially motivated crime. He bled to death after being stabbed, beaten with a hammer, and repeatedly kicked by a gang of British Pakistani men. The incident occurred in Millfield, Peterborough, ten days after the September 11 attacks.

In the United States, Patriot Day occurs on September 11 of each year in memory of the people killed in the September 11 attacks of the year 2001.

Sneha Anne Philip was an American physician who was last seen on September 10, 2001, by a department store surveillance camera near her Lower Manhattan apartment. She may have returned to the building at some point that night or the next morning. Due to the proximity of the World Trade Center and her medical training, her family believes she perished trying to help victims of the following day's terrorist attacks.

Raising the Flag at Ground Zero is a photograph by Thomas E. Franklin of The Record , taken on September 11, 2001. The picture shows three New York City firefighters raising the U.S. flag at Ground Zero of the World Trade Center, following the September 11 attacks. The official names for the photograph used by The Record are Firefighters Raising Flag and Firemen Raising the Flag at Ground Zero. The photo appeared on The Record front page on September 12, 2001. The paper also put it on the Associated Press wire and it appeared on the covers of several newspapers around the world. It has often been compared to the Raising the Flag on Iwo Jima photograph taken by Joe Rosenthal during World War II.
Reactions to the September 11 attacks included condemnation from world leaders, other political and religious representatives and the international media, as well as numerous memorials and services all over the world. The attacks were widely condemned by the governments of the world, including those traditionally considered hostile to the United States, such as Cuba, Iran, Libya, and North Korea. However, in a few cases celebrations of the attacks were also reported, and some groups and individuals accused the United States in effect of bringing the attacks on itself.

The September 11 attacks on the World Trade Center elicited a large response of local emergency and rescue personnel to assist in the evacuation of the two towers, resulting in a large loss of the same personnel when the towers collapsed. After the attacks, the media termed the World Trade Center site "Ground Zero", while rescue personnel referred to it as "the Pile".

September Eleventh Families for Peaceful Tomorrows, also known as 9/11 Families for Peaceful Tomorrows or simply Peaceful Tomorrows, is an anti-war organization for survivors of the September 11, 2001 attacks and friends and family members of the victims.

The Survivors' Staircase was the last visible remaining original structure above ground level at the World Trade Center site. It was originally two outdoor flights of granite-clad stairs and an escalator that connected Vesey Street to the World Trade Center's Austin J. Tobin Plaza. During the September 11 attacks, the stairs served as an escape route for hundreds of evacuees from 5 World Trade Center, a 9-floor building adjacent to the 110-story towers. The staircase is now an important feature of the National September 11 Memorial & Museum.

The Transportation Security Administration (TSA) is an agency of the U.S. Department of Homeland Security that has authority over the security of the traveling public in the United States. It was created as a response to the September 11 attacks.

The Transportation Worker Identification Credential program is a Transportation Security Administration and U.S. Coast Guard initiative in the United States. The TWIC program provides a tamper-resistant biometric credential to maritime workers requiring unescorted access to secure areas of port facilities, outer continental shelf facilities, and vessels regulated under the Maritime Transportation Security Act of 2002, or MTSA, and all U.S. Coast Guard credentialed merchant mariners. As of May 2014, there were 2,999,058 people enrolled in the program. Those seeking unescorted access to secure areas aboard affected vessels, and all Coast Guard credentialed merchant mariners, must obtain a TWIC. The new measures were fully implemented on April 15, 2009. To obtain a TWIC, an individual must provide biographic and biometric information such as fingerprints, sit for a digital photograph and successfully pass a security threat assessment conducted by TSA.

The Tribute in Light is an art installation created in remembrance of the September 11 attacks. It consists of 88 vertical searchlights arranged in two columns of light to represent the Twin Towers. It stands six blocks south of the World Trade Center on top of the Battery Parking Garage in New York City. Tribute in Light began as a temporary commemoration of the attacks in early 2002, but it became an annual event, currently produced on September 11 by the Municipal Art Society of New York. The Tribute in Light was conceived by artists John Bennett, Gustavo Bonevardi, Richard Nash Gould, Julian LaVerdiere, and Paul Myoda, and lighting consultant Paul Marantz.

The Victims of Terrorist Attack on the Pentagon Memorial is a memorial over a group burial site at Arlington National Cemetery in the United States. It commemorates the victims of the Pentagon, which was struck by al-Qaeda terrorists as part of the September 11 attacks. The memorial specifically honors the five individuals for whom no identifiable remains were found. However, a portion of the remains of 25 other victims are buried at the site. The names of the 115 Pentagon employees and 10 contractors in the building, as well as the 53 passengers and six crew members aboard American Airlines Flight 77 are inscribed on the memorial.

The War on terror, also known as the Global War on Terrorism and U.S. War on Terror, is an international military campaign launched by the United States government after the September 11 attacks. The targets of the campaign are primarily Sunni Islamic fundamentalist armed groups located throughout the Muslim world, with the most prominent groups being Al-Qaeda, the Islamic State, the Taliban, Tehrik-i-Taliban Pakistan, and the various franchise groups of the former two organizations. The naming of the campaign uses a metaphor of war to refer to a variety of actions that do not constitute a specific war as traditionally defined. U.S. president George W. Bush first used the term "war on terrorism" on 16 September 2001, and then "war on terror" a few days later in a formal speech to Congress. In the latter speech, George Bush stated, "Our enemy is a radical network of terrorists and every government that supports them." The term was originally used with a particular focus on countries associated with al-Qaeda. The term was immediately criticised by such people as Richard B. Myers, chairman of the Joint Chiefs of Staff, and more nuanced terms subsequently came to be used by the Bush administration to publicly define the international campaign led by the U.S. While it was never used as a formal designation of U.S. operations in internal government documentation, a Global War on Terrorism Service Medal was issued.

The Winter Garden Atrium is a 10-story glass-vaulted pavilion on Vesey Street in New York City's Brookfield Place office complex. Designed by Diana Balmori, the Atrium was originally constructed in 1988, and substantially rebuilt in 2002, after it was damaged by the collapse of the World Trade Center during the September 11 attacks. The Atrium houses various plants, trees and flowers, and shops. The rear of the building opens onto the World Financial Center Plaza and the North Cove Yacht Harbor on the Hudson River.

The World Trade Center cross, also known as the Ground Zero cross, is a formation of steel beams found among the debris of the World Trade Center site in Lower Manhattan, New York City, following the September 11 attacks in 2001. This set of beams is so named because it resembles the proportions of a Christian cross. The beams have been part of an exhibit at the National September 11 Museum since 2014.

The World Trade Center Health Program provides medical benefits to specific groups of individuals affected by the September 11, 2001, terrorist attacks on the United States. The WTC Health Program was established by Title I of the James Zadroga 9/11 Health and Compensation Act, P.L. 111-347, which amended the Public Health Service Act. The United States Congress passed the bill in December 2010 and United States President Barack Obama signed it into law on January 2, 2011. The Zadroga Act required the WTC Health Program to begin administering medical benefits on July 1, 2011. On December 18, 2015, the Zadroga Act was reauthorized to provide medical benefits to affected individuals until 2090. The National Institute for Occupational Safety and Health (NIOSH), within the Centers for Disease Control and Prevention, administers the program. The Centers for Disease Control and Prevention is component of the United States Department of Health and Human Services (HHS).

The World Trade Center site, formerly referred to as "Ground Zero" or "the Pile" immediately after the September 11 attacks, is a 14.6-acre (5.9 ha) area in Lower Manhattan in New York City. The site is bounded by Vesey Street to the north, the West Side Highway to the west, Liberty Street to the south, and Church Street to the east. The Port Authority owns the site's land. The previous World Trade Center complex stood on the site until it was destroyed in the September 11 attacks.
