Staff Sgt. Michael Gwin, 28th Security Forces Squadron military working dog handler, pets Sjors, 28th SFS military working dog, during a training session at the new indoor military working dog training facility at Ellsworth Air Force Base, S.D., Dec. 30, 2015. The new building allows year-round training, regardless of weather conditions. (U.S. Air Force photo by Airman 1st Class James L. Miller/Released)