210731-N-GR655-298 GROTON, Conn. (July 31, 2021) – Sarah Greenert McNichol, Matron of Honor for the future USS Hyman G. Rickover (SSN 795), christens the ship during a ceremony at General Dynamics Electric Boat shipyard facility in Groton, Conn., July 31, 2021. Rickover and crew will operate under Submarine Squadron (SUBRON) FOUR 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 Chief Petty Officer Joshua Karsten/RELEASED)