Retired U.S. Air Force Master Sgt. Walter Boltwood, Radar Approach Control (RAPCON) controller, points to a radar and chats with his peers on Jan. 7, 2020, at Columbus Air Force Base, Miss. Responsible for managing the flow of aircraft through all aspects of their flight, Air Traffic Control specialists ensure the safety and efficiency of air traffic on the ground and in the air. (U.S. Air Force photo by Airman 1st Class Davis Donaldson)