Master Sgt. Rudy Parsons, a pararescueman with the Kentucky Air National Guard’s 123rd Special Tactics Squadron, and Callie, his search and rescue dog, participate in Patriot North, an annual domestic operations exercise designed to provide natural disaster-response training at Volk Field, Wis., July 17, 2019. Callie is currently the only search and rescue dog in the Department of Defense. (U.S. Air National Guard photo by Staff Sgt. Joshua Horton)