U.S. Air Force Staff Sgt. Michael Longero, 52nd Security Forces Squadron military working dog trainer from San Francisco, demonstrates being attacked by a military working dog May 10, 2013, during Spangdahlem Air Base's 60th Anniversary Celebration. The event included a number of exhibits and static displays to show guests the base's capabilities. (U.S. Air Force photo by Airman 1st Class Kyle Gese/Released)