While at Arlington National Cemetery for Veterans Day ceremonies, President Obama and first lady Michelle Obama visited Section 60, the site where many of America's most recent war dead from the Afghanistan and Iraq conflicts are buried, in Arlington, Va., Sunday, Nov. 11, 2012. (AP Photo/J. Scott Applewhite)
President Obama presents a wreath at the Tomb of the Unknowns at Arlington National Cemetery in Arlington, Va., during a Veterans Day ceremony on Nov. 11, 2012. (Associated Press)
President Obama presents a wreath at the Tomb of the Unknowns at Arlington National Cemetery in Arlington, Va., during a Veterans Day ceremony on Nov. 11, 2012. (Associated Press)
Tammy O'Brien kisses the casket one last time after services for her son Marine Lance Corporal Nicholas O'Brien, Tuesday, June 28, 2011, at Arlington National Cemetery in Arlington, Va. O'Brien died June 9 from an IED (improvised explosive device) in Helmand province in southern Afghanistan. (AP Photo/Alex Brandon)
President Obama and first lady Michelle Obama visit Section 60 of Arlington National Cemetery and place Challenge Coins on tombstones on Tuesday, Sept. 11, 2012. (AP Photo/Carolyn Kaster)
Row upon row of white marble monuments at Arlington National Cemetery honor military veterans. More than 400,000 graves line up on its 624 acres, which also hold the Tomb of the Unknowns and the grave of John F. Kennedy. (The Washington Times)
Members of the Air Force Honor Guard hold American flags to be presented to family members during a burial service July 9, 2012, at Arlington National Cemetery in Arlington, Va., for six men killed in 1965 when an Air Force plane carrying the men crashed after leaving Vietnam for a combat mission.
Members of the Air Force Honor Guard hold American flags to be presented to family members during a burial service July 9, 2012, at Arlington National Cemetery in Arlington, Va., for six men killed in 1965 when an Air Force plane carrying the men crashed after leaving Vietnam for a combat mission.
Old Guard Platoon Leader Matthew Hernandez pauses to mourns his friend Sgt. 1st Class Carlos Santos-Silva in front of his grave in section 60 as Hernandez and other soldiers place small American flags at each grave at Arlington National Cemetery to honor the nation's fallen service members in Arlington, Va., Thursday, May 24, 2012. (Andrew Harnik/The Washington Times)
