U.S. Army Spc. Andrew Miller, assigned to the 55th Signal Company (Combat Camera), exits a High Mobility Multipurpose Wheeled Vehicle Egress Assistance Trainer (HEAT), also known as roll over trainer during the Combat Camera First Responder Program at Gunpowder Military Reservation in Glen Arm, Md., May 28, 2015. (U.S. Army photo by Sgt. 1st Class Teddy Wade/Released)