Obama honors fallen troops at Arlington Cemetery
Obama Memorial Day
President Barack Obama, left, walks in with Maj. Gen. Michael S. Linnington, center, Commander of the U.S. Army Military District of Washington, for the wreath-laying ceremony at the Tomb of the Unknowns at Arlington National Cemetery on Memorial Day, Monday, May 28, 2012, in Arlington, Va. (AP Photo/Pablo Martinez Monsivais)