U.S. Navy corpsmen and Marines conduct tactical combat casualty care training during the Combat Trauma Management Course at the Strategic Operations facility, San Diego, on July 30, 2015. (Bobbie Curtis/U.S. Marine Corps)

U.S. Marine Sgt. Arnet Moore, a welder with the Logistics Combat Element, Special Purpose Air-Ground Task Force-Crisis Response-Central Command, welds a piece of metal for a project in Southwest Asia, July 19, 2015. (Cansin Hardyegritag/U.S. Marine Corps)

U.S. Marine Corps Cpl. Christopher Macelveen goes over instructions for his squad aboard a CH-53E Super Stallion, before conducting a tactical recovery of aircraft and personnel mission at Twentynine Palms, Calif., Aug. 1, 2015. (Clarence Leake/U.S. Marine Corps)

The CH-46 begins its landing during the CH-46 Retirement Ceremony at the Smithsonian Institution National Air and Space Museum?s Steven Udvar-Hazy Center in Chantilly, Virginia, Aug. 1, 2015. (Cuong Le/U.S. Marine Corps)

An M1A1 Abrams Main Battle Tank crew with Company A, 4th Tank Battalion, fires its 120mm main gun during the company?s pre-qualification tank gunnery at Twentynine Palms, Calif., Aug. 4, 2015. (Julio McGraw/U.S. Marine Corps)

Staff Sgt. Marissa Grudowski executes a tire flip aboard Marine Corps Air Station Beaufort, S.C., on Aug. 4, 2015, to prepare for the Ultimate Tactical Athlete competition. (Jonah Lovy/U.S. Marine Corps)

Approximately 25 U.S. personnel, as well as Japanese and Australian liaison officers, walk between the JS Hyuga, left, and JS Ashigara during a tour of Japan Maritime Self-Defense Force ships, Aug. 4, 2015, on Joint Base Pearl Harbor-Hickam, Hawaii. (Matthew Bragg/U.S. Marine Corps)

Veterans of the 4th Marine Division observe Marines with Weapons company 1st Battalion, 8th Marine Regiment conduct a pass in review during the 4th MARDIV deactivation ceremony at the Marine Corps Installations East-Marine Corps Base Camp Lejeune Liversedge field, Camp Lejeune, N.C., Aug. 6, 2015. (Allison DeVries/U.S. Marine Corps)

A new Marine of Hotel Company, 2nd Recruit Training Battalion, rings the 2nd Recruit Training Battalion bell during a motivational run Aug. 6, 2015, at Parris Island, S.C. (Jennifer Schubert/U.S. Marine Corps)

Marines with 3rd Battalion, 5th Marine Regiment, 1st Marine Division, insert into the designated landing zone during a helicopter raid, as part of the Marine Corps Combat Readiness Evaluation , at Marine Corps Base Camp Pendleton, Calif., Aug. 4, 2015. (Demetrius Morgan/U.S. Marine Corps)

Sergeant Maj. Bradley Kasal, left, the sergeant major of I Marine Expeditionary Force, left, Lt. Gen. David H. Berger, center, commanding general of I MEF, and 1st. Lt. Bernardo Reynoso, communication officer with 1st Battalion, 7th Marine Regiment, observe Marines with 1/7 as they move into a training area during an Integrated Training Exercise aboard Marine Corps Air Ground Combat Center Twentynine Palms, Calif., Aug. 6, 2015. (Ricardo Hurtado/U.S. Marine Corps)