Making up an exercise - U.S. Marine Corps Lance Cpl. Payten Batalden (left), correctional specialist, 3rd platoon, Brig Company, Security and Emergency Services Battalion, Marine Corps Installations West, Marine Corps Base (MCB) Camp Pendleton gets a simulated bullet wound applied to his head by Chad Clawson, simulation operations specialist, Naval Hospital Camp Pendleton, during Exercise Semper Durus on MCB Camp Pendleton, California, April 9, 2019. Simulation operations specialists create realistic, simulated wounds for training exercises to ensure that the proper casualty assessment and care is being performed. (U.S. Marine Corps photo by Lance Cpl. Drake Nickels)