Air Force Staff Sgt. Brian Smith, 355th Equipment Maintenance Squadron armament flight supervisor, works on a triple ejector bomb rack at Davis-Monthan Air Force Base, Ariz., Oct. 19, 2016. The rack also carries BDU-33s, non-explosive ordnance used during practice, which release smoke to verify if they were placed on target. ( Air Force photo by Airman 1st Class Ashley N. Steffen)

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Keywords: arizona, davis-monthan, dmafb, gatling, gau-8/, gun, maintenance, tucson