Remembering 9/11
A look back at the terrorist attacks of September 11, 2001.
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World Trade Center attack
Destroyed mullions, the vertical struts which once faced the soaring outer walls of the World Trade Center towers, are the only thing left standing behind a lone fireman, after the terrorist attack on the twin towers, Tuesday, Sept. 11, 2001.
Credit: AP Photo/Mark Lennihan
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