Working dog
Yyoda, a U.S. Air Force military working dog, runs through a buried tunnel as part of obstacle course training with his handler, U.S. Air Force Staff Sgt. Justin Ridenour, 97th Security Forces Squadron working dog handler, at Altus Air Force Base, Oklahoma, Feb. 10, 2015. The obstacle course consists of a suspended tunnel, a buried tunnel, stairs, an A-frame, a catwalk and three hurdles. The purpose of the obstacle course is to put the canines in situations that other dogs may not normally experience. It gets them out of their comfort zone so they are more likely to chase a perpetrator, or accompany their handler through dangerous or unusual terrain. (U.S. Air Force photo by Airman 1st Class Megan E. Acs)