Image 0 of 10Marines fire an M777 howitzer high-explosive round during an integrated training exercise at Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., July 30, 2017. (Cpl. Justin M. Smith/Marine Corps) An F/A-18F Super Hornet assigned to Air Test and Evaluation Squadron (VX) 23 flies over the aircraft carrier USS Gerald R. Ford on July 28. (Erik Hildebrandt/Navy) A soldier watches as troops move to cover during Panther Storm at Fort Bragg, North Carolina, Aug. 2, 2017. The exercise tests the division's ability to rapidly deploy its global response force anywhere in the world within a short notice. (Staff Sgt. Andrew Lee/Air Force) Sailors push a type of inflatable target known as a "killer tomato" off the USS Rushmore during a live-fire exercise off the coast of Southern California, Aug. 2, 2017, while training for future operations and deployments. (PO2 Jesse Monford/Navy) U.S. Soldiers take part in Operation Denali Conquest, a 26.2-mile foot march along the park road in Denali National Park, Alaska, July 26, 2017. (John Pennell/Army) The guided-missile destroyer USS Michael Murphy (DDG 112) sails in a Parade of Ships during Seattle's 68th annual Seafair Fleet Week on Aug. 2. (MC2 Jacob G. Sisco/Navy) U.S. Soldiers of the 82nd Airborne Division prepare to conduct a static line jump out of a C-17 Globemaster III during exercise Panther Storm at Fort Bragg, North Carolina, July 26, 2017. (Staff Sgt. Andrew Lee/Air Force) Recruits from India Company, 3rd Recruit Training Battalion, battle each other during Pugil Sticks I at Marine Corps Recruit Depot San Diego, Aug. 2. (Cpl. Angelica Annastas/Marine Corps) Local residents of Khashuri, Georgia welcome the U.S. Army’s 2nd Cavalry Regiment on July 31, 2017 as they finish the last segment of their movement from Poti, Georgia on the Black Sea to Vaziani Training Area in Georgia to begin exercise Noble Partner. (Capt. John W. Strickland/Army) A U.S. Air Force B-1B Lancer prepares to take off for a 10-hour mission from Andersen Air Force Base, Guam, into Japanese airspace and over the Korean Peninsula, July 30, 2017. (Tech. Sgt. Richard P. Ebensberger/Air Force)