Here’s a look back at some of the most iconic photographs from Sept. 11, 2001, from New York City, Washington, D.C., and Shanksville, Pennsylvania, when 2,977 people lost their lives in the worst terrorist attacks on U.S. soil.

A jet airliner flies toward one of the World Trade Center towers in New York on Tuesday, Sept. 11, 2001, as the other tower burns.
Carmen Taylor, Associated Press

Smoke billows from one of the World Trade Center towers as flames and debris explode from the second tower on Tuesday, Sept. 11, 2001, in New York.
Chao Soi Cheong, Associated Press

People in front of New York’s St. Patrick’s Cathedral react with horror as they look down Fifth Avenue toward the World Trade Center towers after planes crashed into their upper floors on Tuesday, Sept. 11, 2001.
Marty Lederhandler, Associated Press

The twin towers of the World Trade Center burn behind the Empire State Building in New York on Tuesday, Sept. 11, 2001.
Marty Lederhandler, Associated Press

White House chief of staff Andy Card whispers into the ear of President George W. Bush to give him word of the plane crashes into the World Trade Center, during a visit to the Emma E. Booker Elementary School in Sarasota, Fla., on Tuesday, Sept. 11, 2001.
Doug Mills, Associated Press

A person falls from the north tower of New York’s World Trade Center after terrorists crashed two hijacked airliners into the World Trade Center and brought down the twin 110-story towers on Tuesday, Sept. 11, 2001.
Richard Drew, Associated Press

Two women embrace each other as they watch the World Trade Center burn following a terrorist attack on the twin skyscrapers in New York on Tuesday, Sept. 11, 2001.
Ernesto Mora, Associated Press

President George W. Bush bows his head for a moment of silence following the plane crashes into the World Trade Center, during a visit to the Emma E. Booker Elementary School in Sarasota, Fla., on Tuesday, Sept. 11, 2001.
Doug Mills, Associated Press

People run from a cloud of debris from the collapse of a World Trade Center tower in New York on Tuesday, Sept. 11, 2001.
Suzanne Plunkett, Associated Press

Smoke and ash engulf lower Manhattan after terrorists flew two airliners into the World trade Center towers in this Sept. 11, 2001, photo made by the New York City Police Department and provided by ABC News,
Greg Semendinger, NYPD via AP

Thick smoke billows into the sky from the area behind the Statue of Liberty, lower left, where the World Trade Center towers stood on Tuesday, Sept. 11, 2001.
Daniel Hulshizer, Associated Press

Pedestrians on Beekman Street flee the area of the collapsed World Trade Center in lower Manhattan following a terrorist attack on the New York landmark on Tuesday, Sept. 11, 2001.
Amy Sancetta, Associated Press

A man wipes ash from his face after terrorists flew two airplanes into the World Trade Center towers, causing them to collapse on Tuesday, Sept. 11, 2001.
Amy Sancetta, Associated Press

People flee the scene near New York’s World Trade Center after terrorists crashed two planes into the towers on Tuesday, Sept. 11, 2001.
Diane Bondareff, Associated Press

Emergency workers look at a crater created when United Airlines Flight 93 crashed near Shanksville, Pa., on Tuesday, Sept. 11, 2001.
Keith Srakocic, Associated Press

Brooklyn firefighters George Johnson, left, of ladder 157, Dan McWilliams, center, of ladder 157, and Billy Eisengrein, right, of Rescue 2, raise a flag at the World Trade Center in New York on Sept. 11, 2001.
Thomas E. Franklin, The Bergen Record via AP

With the skeleton of the World Trade Center twin towers in the background, New York City firefighters work amid debris on Cortlandt Street after the terrorist attacks on Tuesday, Sept. 11, 2001.
Mark Lennihan, Associated Press

A helicopter flies over the Pentagon in Washington, on Tuesday, Sept. 11, 2001, as smoke billows over the building. The Pentagon took a direct, devastating hit from an aircraft and the enduring symbols of American power were evacuated as an apparent terrorist attack quickly spread fear and chaos in the nation’s capital.
Heesoon Yim, Associated Press

President George W. Bush embraces firefighter Bob Beckwith while standing in front of the collapsed World Trade Center buildings in New York as rescue efforts continue on Friday, Sept. 14, 2001.
Doug Mills, Associated Press