Obama urges service, unity on 9/11 anniversary
Obama
Credit: AP
President Barack Obama extends a hand to an unidentified visitor to Section 60 in Arlington National Cemetery Saturday, Sept. 10, 2011, in Arlington, Va., as he and first lady Michelle Obama, left, pay their respects to those who have made the ultimate sacrifice over the past decade. Sunday will mark the 10th anniversary of the Sept. 11 attacks. (AP Photo/Carolyn Kaster)
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