GROTON, Conn. (Aug. 28, 2021) Rear Adm. Douglas Perry, the U.S. Navy's director for undersea warfare, delivers remarks during a commissioning commemoration for the Virginia-class attack submarine USS Vermont (SSN 792) onboard Naval Submarine Base New London in Groton, Conn. Vermont and crew operate under Submarine Squadron (SUBRON) FOUR, whose primary mission is to provide fast-attack submarines that are ready, willing, and able to meet the unique challenges of undersea combat and deployed operations in unforgiving environments across the globe. (U.S. Navy photo by Mass Communication Specialist 3rd Class Javon Swaby)