190320-M-HB658-0077 PACIFIC OCEAN (March 20, 2019) U.S. Navy Hospital Corpsman 3rd Class Justin Smith, left, assigned to Headquarters and Service Company, Battalion Landing Team 3/5, 11th Marine Expeditionary Unit (MEU), gives oxygen to a simulated casualty during a mass casualty scenario aboard the San Antonio-class amphibious transport dock ship USS John P. Murtha (LPD 26). The Marines and Sailors of the 11th MEU are conducting routine training as part of the Boxer Amphibious Ready Group in the eastern Pacific Ocean. (U.S. Marine Corps photo by Staff Sgt. Donald Holbert/Released)