YOKOSUKA, Japan (June 22, 2021) Machinist�s Mate Auxiliary 3rd Class Martin Collin attaches a main ballast tank vent cover as Los Angeles-class fast-attack submarine USS Oklahoma City (SSN 723) arrives at Fleet Activities Yokosuka for a scheduled port visit. Oklahoma City is forward deployed to Guam and routinely operates in the region supporting national security interests and conducting maritime security operations. (U.S. Navy photo by Mass Communication Specialist 2nd Class Adam K. Thomas)