U.S. Air Force Senior Airman Michael Hegarty and Airman 1st Class Megan Andrews, 1st Operations Support Squadron air traffic controllers, look over flying schedules at Langley Air Force Base, Va., Jan. 20, 2015. The schedules are used to track departing and arriving locations of aircraft as well as when aircraft are airborne. (U.S. Air Force photo by Staff Sgt. Natasha Stannard/Released)