161021-M-YJ760-002 U.S. Navy medical technicians conduct a simulated surgery on a casualty during a Marine Corps Combat Readiness Evaluation completed by 1st Medical Battalion, 1st Marine Logistics Group at Camp Pendleton, Calif. The MCCRE was designed to push the Sailors and Marines to the limit with scenarios they would be likely to see in a combat environment such as improvised explosive devices, downed aircraft and mass casualty drills. Marines and Sailors were required to work side-by-side to ensure mission success. (U.S. Marine Corps photo by Lance Cpl. Jocelyn Ontiveros)