A look back at September 11, 2001 attack.
September 11, 2001 Attacks
As America reflects on the September 11 attacks of 2001, here are some of the iconic images from that tragic day.
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Fire trucks sit amid the rubble near the base of the destroyed World Trade Center in New York.
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The remaining tower of New York's World Trade Center, Tower 2, dissolves in a cloud of dust and debris about a half hour after the first twin tower collapsed.
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A rescue helicopter surveys damage to the Pentagon as firefighters battle flames after an airplane crashed into the U.S. military Headquarters outside Washington, D.C.
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A rescue helicopter uses Washington Blvd. outside the Pentagon to evacuate injured personnel after the terror attack on the building.