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Air Force Staff Sgt. Michael Marks, a propulsion mechanic from the Kentucky Air National Guard’s 123rd Airlift Wing, mounts a propeller to a C-130 engine at the Air National Guard’s Air Dominance Center in Savannah, Ga., June 15, 2016. Marks is attending Maintenance University here, a weeklong course designed to provide intensive instruction in aircraft maintenance. Now in its eighth year, Maintenance University is sponsored by the 123rd Airlift Wing. ( Air National Guard photo by Lt. Col. Dale Greer)
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