Aquatic Actions Marine Corps Staff Sgt. Mitchell Howroyd, left, and Cpl. Trenton Frost participate in a martial arts instructor course at Camp Lejeune, N.C., Nov. 25, 2020. The course tests skill, mental discipline, warrior spirit and warfighting mentality. SHARE: Download: Full Size (1.2 MB) Tags: Marine Corps Credit: Marine Corps Lance Cpl. Jacqueline Parsons VIRIN: 201125-M-JQ356-1074M.JPG Photo Gallery