Navy Petty Officer 3rd Class Daniel Evans, foreground, treats a simulated patient during a casualty evacuation exercise at Fire Base Burt, Chocolate Mountain Aerial Gunnery Range, Calif., Oct. 22, 2015. Evans is a hospital corpsman assigned to 1st Medical Battalion, 1st Marine Logistics Group. U.S. Marine Corps photo by Lance Cpl. Roderick L. Jacquote