U.S. Air Force Staff Sgt. Jonathan Royder, a 354th Maintenance Squadron aerospace propulsion craftsman, extracts bolts from a combustion diffuser nozzle assembly Oct. 8, 2015, in the Engine Shop at Eielson Air Force Base, Alaska. Royder serviced the jet engine as part of an engine rebuild involving a complete tear down and inspection of all parts. (U.S. Air Force photo by Senior Airman Peter Reft/Released)
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