ATC: eyes in the night
Airman 1st Class Courtney Johns, an air traffic controller with the 2nd Operations Support Squadron, watches over the airfield from the control tower on Barksdale Air Force Base, La., Jan. 12. ATCs undergo intense training and evaluation before they are certified to control aircraft. Due to the high volume of training missions accomplished here, ATCs must man the tower 24/7. (U.S. Air Force photo/Senior Airman Chad Warren)(RELEASED)