180403-N-NZ935-0046 BOSTON (April 3, 2018) Ship restorers from Naval History and Heritage Command work to raise USS Constitution’s Mizzen Topgallant Royal Mast into place. The square-rigged frigate is America’s Ship of State and the Oldest Commissioned Warship Afloat in the entire world. (U.S. Navy photo by Mass Communication Specialist 1st Class Joshua Hammond/Released)