Airman 1st Class Howie Duong, 48th Operational Support Squadron air traffic controller, watches for aircraft preparing to depart at Royal Air Force Lakenheath, England, Feb. 25, 2020. Air traffic controllers are responsible for managing the flow of aircraft through all aspects of their flight and ensuring the safety and efficiency of air traffic on the ground and in the air. (U.S. Air Force photo by Airman 1st Class Jessi Monte)