Staff Sgt. Justin, military working dog handler, runs his MWD Oxigen over the stairs a part of their obstacle course during an obedience training session at an undisclosed location in Southwest Asia Jan. 5, 2015. Receiving on average of at least 30 training sessions a month, the MWD teams train on as many realistic scenarios as possible. Justin is currently deployed from Fairchild Air Force Base, Wash., and is a native of Tamuning, Guam. (U.S. Air Force photo/Tech. Sgt. Marie Brown)