180531-N-SM577-0004 BOSTON (May 31, 2018) Ship’s riggers assigned to Naval History and Heritage Command, Detachment Boston, apply braces to USS Constitution’s main mainmast yard before putting the yard back into place. The square-rigged frigate is America’s Ship of Sate and the oldest commissioned warship afloat in the world. (U.S. Navy photo by Mass Communication Specialist 3rd Class Casey Scoular/Released)