Roger Snow, a field service representative for Rolls-Royce Corp., teaches Airmen from the Connecticut, Kentucky, Montana and Missouri Air National Guard about the operation of C-130 engines during a class at the Air National Guard’s Air Dominance Center in Savannah, Ga., June 15, 2016. The class is part of 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)