Looking back and ahead, America remembers 9/11
Sept 11 Anniversary
Credit: AP
President Barack Obama embraces the family member of a victim of the Sept. 11 terrorist attacks as first lady Michelle Obama, right, stands by at the Sept. 11 Memorial during the 10th anniversary ceremony at the site of the World Trade Center Sunday, Sept. 11, 2011, in New York. (AP Photo/Chip Somodevilla, Pool)
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