180718-N-LW591-038 GROTON, Conn. (July 17, 2018) Machinists Mate (Non-Nuclear, Submarine Weapons) 3rd Class Joel Rumsey explains torpedo operations to Adm. Christopher Grady, commander of U.S. Fleet Forces Command, aboard the Virginia-class fast-attack submarine USS North Dakota (SSN 784) during a visit to Submarine Base New London. (U.S. Navy photo by Mass Communication Specialist 1st Class Steven Hoskins/Released)