APRA HARBOR, Guam (Aug. 25, 2022) The Seawolf-class fast-attack submarine USS Seawolf (SSN 21) sails into Apra Harbor, Naval Base Guam. Seawolf is a nuclear powered fast-attack submarine and is the lead ship of its class. (U.S. Navy photo by Mass Communication Specialist 2nd Class Joshua M. Tolbert)