180813-N-NZ935-0398 BOSTON (Aug. 13, 2018) Sailors assigned to USS Constitution and contractors from the Navy History and Heritage Command, Detachment Boston, work to install the Main Topsail 175 feet over the deck of USS Constitution. Constitution’s crewmembers conduct weekly training to learn and retain sailing information. (U.S. Navy photo by Mass Communication Specialist 1st Class Joshua Hammond/Released)