A military honor guard member carries a wreath during a ceremony at Arlington National Cemetery in Arlington, Va., Sept. 25, 2015. During the ceremony, Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, placed the wreath at the Tomb of the Unknown Soldier as he prepared to retire after 41 years of service. U.S. Army photo by Spc. Cody W. Torkelson