U.S. Air Force Staff Sgt. Travis Dulworth, 22nd Security Forces Squadron military working dog handler, lays on the ground while U.S. Air Force Staff Sgt. Max Soto, 22nd Security Forces Squadron military working dog kennel master, gives challenge commands alongside his K-9, "Atom," during controlled aggression training Dec. 9, 2010, McConnell Air Force Base, Kan. In controlled aggression training, the dog handler utilizes the K-9, with and without commands, to seek, detect, bite or hold a suspect for effective control. During threatening situations, the K-9 can protect and deter attacks on their handler. (U.S. Air Force photo by Senior Airman Maria A. Ruiz/Released)