A U.S. Army 3rd U.S. Infantry Regiment (The Old Guard) relief commander inspects a guard rifle during the Gold Star Mother’s Day Observance at Arlington National Cemetery in Arlington, Va., Sept. 27, 2015. After the relief commander inspected the rifle, he walked to the center of the Tomb of the Unknown Soldier and announced the Changing of the Guard and the beginning of the observance. (U.S. Air Force photo by Staff Sgt. Natasha Stannard/Released)