On this tragic day in history, Sept. 11, 2001, Americans and the entire world watched as two airplanes slammed into the World Trade Center’s Twin Towers in New York City while a third plane crashed into the Pentagon in Arlington, Virginia.
The Twin Towers in Lower Manhattan collapsed a short time later.
Passengers on board a fourth airplane, Flight 93, averted additional destruction by trying to regain control of their plane from the hijackers.
Due to this intervention, the hijackers downed the aircraft in a field near Shanksville, Pennsylvania. Flight 93’s intended target was likely either the White House or the United States Capitol, according to the George W. Bush Presidential Library.