Martial Mission Marines complete the Martial Arts Instructor Trainer Course 2-18’s culminating event at Marine Corps Base Quantico, Va., July 18, 2018. Marine Corps photo by Staff Sgt. Melissa Marnell SHARE: Download: Full Size (4.68 MB) Credit: Staff Sgt. Melissa Marnell VIRIN: 180718-M-DY697-0005C.JPG Photo Gallery