A 51st Civil Engineering Squadron drone performs a roof inspection roughly 200 feet above Osan Air Base, Nov. 2, 2020. The 51st CES has incorporated the use of drones into the facility inspection process in close coordination with the 51st Operations Support Squadron, who overseas Air Traffic Control and airfield operations, to ensure the continued safety of the airfield while operating a non-standard flying operation in close proximity to the flightline. (U.S. Air Force photo by 1st Lt. Daniel de La Fé)