U.S Air Force Airman 1st Class Maggie Breedlove, 317th Operational Support Squadron aircrew flight equipment apprentice, inspects Emergency Passenger Oxygen Systems at Dyess Air Force Base, Texas, Dec. 12, 2018. Every week, the AFE shop has to inspect over 300 individual EPOS units to ensure they function correctly. (U.S. Air Force photo by Airman 1st Class Rebecca Van Syoc)