K-9 cop
U.S. Air Force Senior Airmen Zachary Villano and David Ferro, 354th Security Forces Squadron K-9 handlers, train military working dog Spiky during a demonstration, July 30, 2013, Eielson Air Force Base, Alaska. The dogs are highly trained to obey specific commands to apprehend assailants. (U.S. Air Force photo by Staff Sgt. Jim Araos/Released)