Cpl. Collin Osgood (left), a scout observer with 1st Battalion, 12th Marine Regiment and Petty Officer 3rd Class KC Lorilla, a hospital corpsman with 1st Bn., 12th Marines, prepare a simulated casualty for evacuation. Staff Sgt. Christopher McFarland, a forward observer with 1st Bn., 12th Marines, simulates a wounded leg and arm injury as a UH-1Y Venom helicopter lands to conduct a casualty evacuation on Pohakuloa Training Area, March 12, 2015. (U.S. Marine Corps photo by Lance Cpl. Khalil Ross/Released) - Cpl. Collin Osgood (left), a scout observer with 1st Battalion, 12th Marine Regiment and Petty Officer 3rd Class KC Lorilla, a hospital corpsman with 1st Bn., 12th Marines, prepare a simulated casualty for evacuation. Staff Sgt. Christopher McFarland, a forward observer with 1st Bn., 12th Marines, simulates a wounded leg and arm injury as a UH-1Y Venom helicopter lands to conduct a casualty evacuation on Pohakuloa Training Area, March 12, 2015. (U.S. Marine Corps photo by Lance Cpl. Khalil Ross/Released)