200225-N-YD647-1097 SANTA RITA, Guam (Feb. 25, 2020) Senior Chief Matthew Zwan, from Garden Grove, Calif., chief of the boat aboard the Los Angeles-class fast attack submarine USS Topeka (SSN 754), explains the external components of the boat to Brandon Vera, a wrestler with One Championship and a U.S. Air Force veteran, during a Morale, Welfare and Recreation tour. Topeka is one of four forward-deployed submarines assigned to Commander, Submarine Squadron Fifteen out of Polaris Point, Naval Base Guam. (U.S. Navy photo by Mass Communication Specialist 2nd Class Destinyy Reed)