Staff Sgt. Mark Sidle (right), 28th Security Forces Squadron military working dog handler, calls off his dog, Arco, during an apprehension demonstration on a decoy, Senior Airman Jared Poe, 28th SFS military working dog handler, done as part of Spouse Appreciation Day at Ellsworth Air Force Base, S.D., May 10, 2013. The demonstration showcased the way that Ellsworth defenders use military working dogs to apprehend suspects and provide security for the base. (U.S. Air Force photo by Airman 1st Class Alystria Maurer/Released)