GROTON, Conn. (August 28, 2021) Secretary of the Navy Carlos Del Toro is welcomed by Rear Adm. Douglas Perry, the Navy’s director for undersea warfare, during a commissioning commemoration for the USS Vermont (SSN 792) onboard Naval Submarine Base New London in Groton, Conn., Aug. 28, 2021. 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 Chief Mass Communication Specialist Joshua Karsten)