JUN 9, 2021 - U.S. Marines with Marine Corps Air Station Miramar spar in Pacific Ocean during the Martial Arts Instructors Course 148-21 culminating event on Naval Air Station North Island, San Diego, Calif., May 27, 2021. The culminating event is the last event of the 3-week-long course and tests the martial arts skills, mental discipline, warrior spirit, and warfighting mentality of the future Marine Corps Martial Arts Program instructors. U.S. Marine Corps photo by Lance Cpl. Krysten