MARINE CORPS AIR STATION YUMA, Ariz. -- Marines with Headquarters and Headquarters Squadron graduate Martial Arts Instructor Course 166-21 at Marine Corps Air Station Yuma, Ariz. May 27, 2021. The course allows the newly trained Marines to teach and award the next belt level to deserving Marines. (U.S. Marine Corps photo by Lance Cpl. Matthew Romonoysky-Bean)