U.S. Marine Corps Staff Sgt. Joseph Colvin, the storage staff noncommissioned officer in charge with Ammunition Company, 3rd Supply Battalion, Combat Logistics Regiment 35, 3rd Marine Logistics Group, III Marine Expeditionary Force, conducts push-ups during the water survival advanced course on Marine Corps Air Station Futenma, Okinawa, Japan, June 17, 2021. WSA is the highest swim qualification Marines and sailors can obtain before moving onto the next echelon of becoming a Marine Corps Instructor of Water Survival. The week-long course kicks off with a water survival pre screening event, and the remainder of the course consists of numerous endurance swims, life-saving techniques and applications, physical and mental conditioning, and countless swimming drills to ensure students have the confidence to not only maintain themselves but others’ lives while in the water. Colvin is a native of Philadelphia, Pennsylvania.