A soldier with the 3rd U.S. Infantry Regiment, also known as "The Old Guard," places flags at grave sites at Arlington National Cemetery in Arlington, Va., on Thursday, May 23, 2013, as part of the annual "Flags-In" ceremony in preparation for Memorial Day. (AP Photo/Evan Vucci)

Photo by: Evan Vucci

A soldier with the 3rd U.S. Infantry Regiment, also known as "The Old Guard," places flags at grave sites at Arlington National Cemetery in Arlington, Va., on Thursday, May 23, 2013, as part of the annual "Flags-In" ceremony in preparation for Memorial Day. (AP Photo/Evan Vucci)