Pvt. Christopher Nelson, field artillery cannoneer, sits in a Medium Tactical Vehicle Replacement with Gracie Lynn Sandefur, 7, and Bentley Sandefur, 5, at the Community Center Park during the Yucca Valley Independence Day Celebration, July 4, 2015. (Medina Ayala-Lo/U.S. Marine Corps)

U.S. Marine Corps amphibious assault vehicles, assigned to the 31st Marine Expeditionary Unit, come ashore at Fog Bay, Australia, during exercise Talisman Sabre, July 8, 2015. (Ricardo Morales/U.S. Marine Corps)

A U.S. Marine Corps CH-53E Super Stallion Helicopter prepares to land at Bradshaw Field Training Area during the start of Exercise Talisman Sabre 15 on July 6, Northern Territory, Australia. (Ozzy Ortega/U.S. Marine Corps)

U.S. Marines with 1st Battalion, 4th Marine Regiment, exit a CH-53E Super Stallion Helicopter to prepare for a movement to contact exercise during the start of Exercise Talisman Sabre 15 on July 6, in Bradshaw, Northern Territory, Australia. (Ozzy Ortega/U.S. Marine Corps)

Crewmembers of the USNS Sacagawea conducts flight operations with a U.S. Marine Corps MV-22B Osprey, from Marine Medium Tiltrotor Squadron 265, 31st Marine Expeditionary Unit, during exercise Talisman Sabre 15, July 9, 2015. (Ricardo Morales/U.S. Marine Corps)

A U.S. Marine Corps CH-53E Super Stallion from Marine Medium Tiltrotor Squadron 265 (Reinforced), 31st Marine Expeditionary Unit, touches down at a landing zone while conducting a Tactical Recovery of Aircraft and Personnel during exercise Talisman Sabre 15 in Fog Bay, Northern Territory, Australia, July 9, 2015. (Eric Clayton/U.S. Marine Corps)

Lance Cpl. Christian Calderella, top, fights to subdue Lance Cpl. Paul Kainz during a short-range marksmanship qualification course aboard the dock landing ship USS Rushmore. Calderella and Kainz are both automatic riflemen with Company K, Battalion Landing Team 3rd Battalion, 1st Marine Regiment, 15th Marine Expeditionary Unit. (Emmanuel Ramos/U.S. Marine Corps)

Lance Cpl. Jason R. Jimenez, a combat correspondent assigned to Headquarters and Headquarters Squadron, performs a ''plank'' exercise while conducting Marine Corps Martial Arts Program training at Marine Corps Air Station Cherry Point, N.C., July 7, 2015. (Koby Saunders/U.S. Marine Corps)

U.S. Marine Lance Cpl. Gordon Kwei, anti-tank missile man with Weapons Company, Black Sea Rotational Force, fires the tube-launched, optically tracked, wire-guided anti-tank missile, while Staff Sgt. Wayne Edmiston, combat correspondent with Black Sea Rotational Force, records it during the combined anti-armor team sustainment training for Exercise Platinum Lion 15-3, July 8, 2015, at Novo Selo Training Area, Bulgaria. (Sarah Burns/U.S. Marine Corps)

Recruit Robert J. Reynolds removes lint from a fellow recruit?s uniform before his boot camp photo is taken July 8, 2015, on Parris Island, S.C. (Vanessa Austin/U.S. Marine Corps)