150518-N-OG138-276 CHARLESTOWN, Mass. (May 18, 2015) USS Constitution enters Dry Dock 1 in Charlestown Navy Yard to commence a multi-year planned restoration period. This is Constitution’s first time in dry dock since its 1992-1996 restoration. (U.S. Navy photo by Mass Communication Specialist Seaman Matthew R. Fairchild/Released)
