171103-N-SM577-0383 BOSTON (Nov. 3, 2017) Cmdr. Nathaniel R. Shick relieves Cmdr. Robert S. Gerosa, Jr., as Commanding Officer of USS Constitution during a change of command ceremony. USS Constitution, America's Ship of State, actively defended sea lanes against global threats from 1798-1855. Now a featured destination on Boston's Freedom Trail, Constitution and her crew of active duty U.S. Navy sailors offer community outreach and education about the ship's history and the importance of naval sea power to more than 500,000 visitors each year. (U.S. Navy photo by Mass Communication Specialist 3rd Class Casey Scoular/Released)