Staff Sgt. Christopher Averill, 5th Security Forces Squadron military working dog handler, leads his 5-year-old German Shepherd, Kety, over an obstacle during the 2013 North Dakota Peace Officer Association K-9 Police Trials at Minot Air Force Base, N.D., Aug. 14, 2013. In addition to competing against others from their squadron, Averill and Kety competed against handlers from state and local law enforcement agencies, as well as security forces handlers assigned to Grand Forks Air Force Base, N.D. (Stephanie Ashley/U.S. Air Force)

Our staff-selected photos of the week of the Air Force in action.

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