Air Traffic Control: Keeping eyes on the sky
Senior Airman Joel Williams III, a 28th Operations Support Squadron air traffic control journeyman, monitors at the entrance screen inside the air traffic control tower at Ellsworth Air Force Base, S.D., July 10, 2018. Air traffic controllers at Ellsworth AFB work two different shifts at the tower: one morning shift and one swing shift in the afternoon. (U.S. Air Force photo by Airman 1st Class Nicolas Z. Erwin)