U.S. commemorates 9/11 at Ground Zero, Pentagon, Shanksville memorial

Events are taking place at all three sites directly affected by the hijacked planes on Sept. 11, 2001, as the U.S. commemorates the 20th anniversary of the terror attacks.

At Ground Zero in New York, President Biden joined former Presidents Bill Clinton and Barack Obama for a ceremony, which included six separate moments of silence. The first one took place at 8:46 a.m. ET, the time when the first plane struck the north tower of the World Trade Center complex. The bells rang again 17 minutes later — the second plane hit the south tower at 9:03 a.m. ET. The next four moments of silence then came at 9:37 a.m., 9:59 a.m, 10:03 a.m. and, finally, 10:28 a.m. to mark, respectively, when the third plane struck the Pentagon, the south tower collapsed, Flight 93 crashed into a Pennsylvania field after passengers revolted against the hijackers, and the north tower fell.

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Tim O'Donnell

Tim is a staff writer at The Week and has contributed to Bedford and Bowery and The New York Transatlantic. He is a graduate of Occidental College and NYU's journalism school. Tim enjoys writing about baseball, Europe, and extinct megafauna. He lives in New York City.