U.S. Air Force Staff Sgt. Julie Gibbs, 9th Security Forces military working dog handler, prepares to release Kanto, during a training scenario at Beale Air Force Base Calif., June 14, 2012. MWDs use their keen sense of smell to search vehicles and buildings. (U.S. Air Force photo by Staff Sgt. Robert M. Trujillo/Released)

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Photo by: Staff Sgt. Robert M. TrujilloReleased |  VIRIN: 120614-F-NA343-154.JPG