An Airman from F.E. Warren Air Force Base, Wyo. loads rounds into a machine gun, mounted to a vehicle, during a nuclear-convoy training exercise at Camp Guernsey, Wyo., Oct. 17, 2012. The 10-day exercise is designed to teach airmen how to safely transport nuclear resources in a convoy formation. (U.S. Air Force photo by Senior Airman Jarad A. Denton/Released)