Tech. Sgt. Laurence Holter, 28th Comptroller Squadron NCO in charge of finance services, simulates a head injury caused by a vehicle accident during a major accident response exercise at Ellsworth Air Force Base, S.D., April 22, 2015. The MARE was designed to prepare and assess base personnel and responders actions during severe weather conditions. (U.S. Air Force photo by Senior Airman Anania Tekurio/Released)