Air traffic controllers bring order to chaos in England skies
Senior Airman Drew Kalina, a 100th Operations Support Squadron air traffic controller, demonstrates how to use a light gun in the air traffic control tower Sept. 21, 2015, on Royal Air Force Mildenhall, England. A light gun is used when there is no way of communicating with pilots via radio. (U.S. Air Force photo/Senior Airman Christine Halan)