GROTON, Conn. (Dec.20, 2023) Santa waves from aboard the Virginia-class attack submarine USS Hyman G. Rickover (SSN 795) as the boat prepares to moor at Naval Submarine Base New London in Groton, Conn., Dec. 20, 2023. Hyman G. Rickover and crew operate under Submarine Squadron (SUBRON) 4, whose primary mission is to provide 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 John Narewski)