Military working dogs train to perform
U.S. Air Force Staff Sgt. Shannon Hennessy, 52nd Security Forces Squadron military working dog handler from Colusa, Calif., commands her dog, Katya, to sit during an obedience training course at Spangdahlem Air Base, Germany, May 27, 2014. Dog handlers direct their dogs through an obedience course at least once every work cycle, or approximately every four days. (U.S. Air Force photo by Senior Airman Gustavo Castillo/Released)