Security forces Airmen participate in the fourth day of a 10-day nuclear-convoy training exercise at Camp Guernsey, Wyo., Oct. 18, 2012. Airmen from F.E. Warren Air Force Base, Wyo., were given detailed instructions on how to properly clear multiple rooms with armed, hostile forces who had stolen a nuclear resource. (U.S. Air Force photo by Airman 1st Class Kayla Newman/Released)