This picture were taken during the day of 9/11.

On Sept. 11, 2001, hijackers caught U.S. authorities by surprise with a bold attack on New York City's World Trade Center. —Sean Adair

Pedestrians run for cover after the collapse of the south tower. —Suzanne Plunkett

A New York City firefighter walks away from ground zero after the collapse of the towers. —Anthony Correia

A person jumps from the north tower of New York's World Trade Center. —Richard Drew

A plane hits the south tower of the World Trade Center. —Spencer Platt
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