Airman Marquel Marshall and Airman 1st Class Darris Little, both 67th Aircraft Maintenance Unit F-15 Eagle crew chiefs, service a liquid oxygen converter on the flightline Aug. 24, 2016, at Kadena Air Base, Japan. Marshal and Little work as swing shift maintainers, ensuring around-the-clock mission readiness of Kadena AB’s F-15s. (U.S. Air Force photo/Senior Airman Peter Reft)