374th K-9 Unit
Staff Sgt. Mathis Williams, 374th Security Working Squadron military working dog handler, leads Stella through the aisles at the base theater in an aggression, detection, aggression training exercise at Yokota Air Base, Japan, Nov. 19, 2013. The purpose of the exercise is to see how the canine reacts when finding a subject (aggression), then looking for explosive aids (detection), back to attacking a subject (aggression). (U.S. Air Force photo by Airman 1st Class Meagan Schutter/Released)