APRA HARBOR, Guam (July 15, 2022) The Seawolf-class fast-attack submarine USS Seawolf (SSN 21) sails into Apra Harbor, outside of 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 Seaman Apprentice Darek Leary)