Ralph Kellenberger, FlightSafety flight engineer instructor, walks Tech. Sgt. Ryan Berry, 312th Airlift Squadron flight engineer, and Master Sgt. James Spinner, 9th AS flight engineer, through C-5M Super Galaxy pre-fight procedures during initial qualification training March 10, 2016, at Dover Air Force Base, Del. FlightSafety operates on Dover AFB as a contractor that trains Air Force pilots and flight engineers. (U.S. Air Force photo/Senior Airman Zachary Cacicia)