Staff Sgt. Andre Hernandez goes through different obstacles with his dog, Ivan, Nov. 14, 2014, at Dyess Air Force Base, Texas. Most of Hernandez and Ivan’s days are spent training on their course, working on commands and obedience, providing security and explosive and narcotic deterrence for the base. Hernandez is a 7th Security Forces Squadron K-9 military working dog handler. (U.S. Air Force photo/Senior Airman Shannon Hall)