U.S. Air Force Staff Sgt. Alexandra Springman, 355th Security Forces Squadron military working dog handler, pets Dexter, a retired MWD, in Tucson, Ariz., Feb. 25, 2014. Springman adopted Dexter after he retired for the Air Force due to a medical condition. (U.S. Air Force photo by Airman 1st Class Betty R. Chevalier/Released)