Chief Master Sgt. Terry Studstill, 700th Airlift Squadron flight engineer superintendent, shows a patch displaying 10,000 hours shortly before taking off on a flight from Dobbins Air Reserve Base, Ga. on Nov. 25, 2019. During the flight, he reached 10,000 hours, a major milestone in an aviator's career. (U.S. Air Force photo/Tech. Sgt. Andrew Park)