U.S. Air Force Senior Airman Christian Gates, 7th Component Maintenance Squadron test cell craftsman, performs last minute adjustments to an F101 engine June 6, 2016, at Dyess Air Force Base, Texas. The test cell puts the motor through a full functional test as part of their maintenance process. Once the unit has been cleared and inspected, it can be installed as part of a set of four on a B-1B Lancer. (U.S. Air Force photo by Airman 1st Class Quay Drawdy/Released)