Obama Marks 10th Anniversary Of 9/11 Attacks At The Flight 93 National Memorial
SHANKSVILLE, PA – SEPTEMBER 11: President Barack Obama and first lady Michelle Obama walk along the Wall of Names during the ceremony marking the 10th anniversary of the crash of United Flight 93 at the Flight 93 National Memorial on September 11, 2011 in Shanksville, Pennsylvania. An estimated crowd of 5,000 watched as the memorial wall was unveiled with the names of the 40 passengers who died when the plane crashed during the terrorist attacks on September 11, 2001. (Photo by Jeff Swensen/Getty Images)