ELLSWORTH AIR FORCE BASE, S.D. – (Front) Airman 1st Class William Olson gives a position relief briefing to Airman 1st Class Jakob Schmitt, June 21. Both Airmen are air traffic controllers assigned to the 28th Operations Support Squadron. The briefing updates the next shift of personnel on the events currently taking place to ensure continuity between shift changes. (U.S. Air Force photo/Airman 1st Class Matthew Flynn)