Americans Remember The 9/11 Terrorist Attacks

Published September 11th, 2021 - 05:08 GMT

Americans mark the 20th anniversary of the 9/11 terror attacks - a series of four coordinated terrorist attacks by the militant group al-Qaeda against the United States of America on the morning of Tuesday, September 11, 2001.

US President Joe Biden has urged Americans to embrace unity as they reflect on the day that two decades ago reshaped the nation.

On that morning, four commercial airliners traveling from the northeastern United States to California were hijacked mid-flight by 19 al-Qaeda terrorists. The hijackers were organized into three groups of five hijackers and one group of four. Each group had one hijacker who had received flight training and took over control of the aircraft. 

Al-Qaeda terror group was led by Osama bin Laden who initially denied any involvement in the 9/11 attacks but, in 2004 he formally claimed responsibility for the attacks.

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US marks the 20th anniversary of 9/11

People walk among American flags displayed to commemorate lives lost in the 9/11 terror attack, on September 10, 2021 at Pepperdine University in Malibu, California. The display includes 2,977 national flags flying on the university's front lawn facing the Pacific Ocean with one US flag for each American victim and a national flag for every lost life of a foreign national. (Photo by Robyn Beck / AFP)

US marks the 20th anniversary of 9/11

People watch the cast of the broadway musical ‘Come From Away' perform a free concert in front of the Lincoln Memorial on September 10, 2021 in Washington, DC. The performance, put on by Ford’s Theatre, comes on the eve of the 20th anniversary of 9/11 and tells the story of a Canadian town that took in airplane passengers who were stranded when U.S. air traffic abruptly halted after the terrorist attacks on September 11, 2001. Anna Moneymaker/Getty Images/AFP

US marks the 20th anniversary of 9/11

Actors from the broadway musical ‘Come From Away' perform a free concert in front of the Lincoln Memorial on September 10, 2021 in Washington, DC. The performance, put on by Ford’s Theatre, comes on the eve of the 20th anniversary of 9/11. Anna Moneymaker/Getty Images/AFP

US marks the 20th anniversary of 9/11

People sit before the Brooklyn waterfront and the 'Tribute in Light' installation commemorating the 9/11 terrorist attacks, in New York on September 10, 2021. (Photo by Ed JONES / AFP)

US marks the 20th anniversary of 9/11

Sailor Joseph Favata of the USS Somerset watches visitors at the Flight 93 National Monument before the Luminaria Ceremony on September 10, 2021 in Shanksville, Pennsylvania. The Luminaria Ceremony commemorates the 40 victims of Flight 93 on the 20th Anniversary of September 11th. Jeff Swensen/Getty Images/AFP

US marks the 20th anniversary of 9/11

Two women hold candles as they attend a 9/11 commemoration religious ceremony at the Greek Orthodox St. Nicholas National Shrine adjacent to the 9/11 Memorial & Museum in New York City on September 10, 2021. (Photo by ROBERTO SCHMIDT / AFP)

US marks the 20th anniversary of 9/11

The annual Tribute in Light projects two pillars of light into the night sky next to the buildings overlooking the 9/11 Memorial & Museum in New York City on September 10, 2021. (Photo by ROBERTO SCHMIDT / AFP)

US marks the 20th anniversary of 9/11

A bouquet of flowers is left on the window ledge outside the Engine 6 firehouse -- home to 4 firefighters who died in the September 11, 2001 terrorist attack -- on September 10, 2021 in New York City. AFP/File

US marks the 20th anniversary of 9/11

Linda Terry places a flower near the name of a friend and former client, who died in the September 11, 2001 terrorist attack in New York City at the National 9/11 Memorial & Museum on September 10, 2021. (Photo by ROBERTO SCHMIDT / AFP)

US marks the 20th anniversary of 9/11
US marks the 20th anniversary of 9/11
US marks the 20th anniversary of 9/11
US marks the 20th anniversary of 9/11
US marks the 20th anniversary of 9/11
US marks the 20th anniversary of 9/11
US marks the 20th anniversary of 9/11
US marks the 20th anniversary of 9/11
US marks the 20th anniversary of 9/11
US marks the 20th anniversary of 9/11
People walk among American flags displayed to commemorate lives lost in the 9/11 terror attack, on September 10, 2021 at Pepperdine University in Malibu, California. The display includes 2,977 national flags flying on the university's front lawn facing the Pacific Ocean with one US flag for each American victim and a national flag for every lost life of a foreign national. (Photo by Robyn Beck / AFP)
US marks the 20th anniversary of 9/11
People watch the cast of the broadway musical ‘Come From Away' perform a free concert in front of the Lincoln Memorial on September 10, 2021 in Washington, DC. The performance, put on by Ford’s Theatre, comes on the eve of the 20th anniversary of 9/11 and tells the story of a Canadian town that took in airplane passengers who were stranded when U.S. air traffic abruptly halted after the terrorist attacks on September 11, 2001. Anna Moneymaker/Getty Images/AFP
US marks the 20th anniversary of 9/11
Actors from the broadway musical ‘Come From Away' perform a free concert in front of the Lincoln Memorial on September 10, 2021 in Washington, DC. The performance, put on by Ford’s Theatre, comes on the eve of the 20th anniversary of 9/11. Anna Moneymaker/Getty Images/AFP
US marks the 20th anniversary of 9/11
People sit before the Brooklyn waterfront and the 'Tribute in Light' installation commemorating the 9/11 terrorist attacks, in New York on September 10, 2021. (Photo by Ed JONES / AFP)
US marks the 20th anniversary of 9/11
Sailor Joseph Favata of the USS Somerset watches visitors at the Flight 93 National Monument before the Luminaria Ceremony on September 10, 2021 in Shanksville, Pennsylvania. The Luminaria Ceremony commemorates the 40 victims of Flight 93 on the 20th Anniversary of September 11th. Jeff Swensen/Getty Images/AFP
US marks the 20th anniversary of 9/11
Two women hold candles as they attend a 9/11 commemoration religious ceremony at the Greek Orthodox St. Nicholas National Shrine adjacent to the 9/11 Memorial & Museum in New York City on September 10, 2021. (Photo by ROBERTO SCHMIDT / AFP)
US marks the 20th anniversary of 9/11
The annual Tribute in Light projects two pillars of light into the night sky next to the buildings overlooking the 9/11 Memorial & Museum in New York City on September 10, 2021. (Photo by ROBERTO SCHMIDT / AFP)
US marks the 20th anniversary of 9/11
A bouquet of flowers is left on the window ledge outside the Engine 6 firehouse -- home to 4 firefighters who died in the September 11, 2001 terrorist attack -- on September 10, 2021 in New York City. AFP/File
US marks the 20th anniversary of 9/11
Linda Terry places a flower near the name of a friend and former client, who died in the September 11, 2001 terrorist attack in New York City at the National 9/11 Memorial & Museum on September 10, 2021. (Photo by ROBERTO SCHMIDT / AFP)

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