The U.S. Army Chorus performs during the closing moments of Maj. Gen. Harold J. Greene's Memorial Ceremony in the Pentagon, Aug 13, 2014. Greene was killed in a insider attack while deployed to Afghanistan on Aug 5, 2014. He will be interred at Arlington National Cemetery, Va., Aug. 14, 2014. (U.S. Army photo by Staff Sgt. Mikki L. Sprenkle/Released)