Senior Airman Grant Krause, a 28th Operations Support Squadron air traffic control journeyman, looks at the flight line through blue shaded blinds inside the air traffic control tower at Ellsworth Air Force Base, S.D., July 10, 2018. Due to the high-stress nature of the job, the air traffic controller’s technical training attrition rate is only 50 percent, making the success of their job even more crucial. (U.S. Air Force photo by Airman 1st Class Nicolas Z. Erwin)