Tenth anniversary of Sept. 11 attacks

President Obama and former President George W. Bush lead a remembrance ceremony of the fateful day in 2001.

President Obama embraces the family member of a victim of the Sept. 11 terrorist attacks as first lady Michelle Obama (right) looks on during the 10th-anniversary ceremony at the Sept. 11 Memorial at ground zero in New York on Sunday, Sept. 11, 2011. (AP Photo/Chip Somodevilla, Pool)

President Obama embraces the family member of a victim of the Sept. 11 terrorist attacks as first lady Michelle Obama (right) looks on during the 10th-anniversary ceremony at the Sept. 11 Memorial at ground zero in New York on Sunday, Sept. 11, 2011. (AP Photo/Chip Somodevilla, Pool)

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