Looking back and ahead, America remembers 9/11
Obama Sept 11
Credit: AP
President Barack Obama, looks upwards as he visits the North Memorial Pond with first lady Michelle Obama and former President George W. Bush and former first lady Laura Bush, not visible, visit North Memorial Pond at the National Sept. 11th Memorial Sunday, Sept., 11, 2011 in New York. (AP Photo/Pablo Martinez Monsivais)
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