Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, lays a wreath at the Tomb of the Unknown Soldier in Arlington National Cemetery, Va., Sep. 25th, 2015. Hosting the wreath laying ceremony was Maj. Gen. Bradley A. Becker, Commanding General, Military District of Washington. Gen. Dempsey laid the wreath to honor the Unknown Soldiers as he retires after 41 years of service. U.S. Army photo by Spc. Cody W. Torkelson