U.S. Air Force Staff Sgt. Michael Marks (left) and U.S. Air Force Tech. Sgt. Alan Broadus, propulsion mechanics from the Kentucky Air National Guard’s 123rd Airlift Wing, mount a propeller to a C-130 engine at the Air National Guard’s Air Dominance Center in Savannah, Ga., June 15, 2016. Both Airmen are 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. (U.S. Air National Guard photo by Lt. Col. Dale Greer)