Testing, testing… 1, 2, 3
U.S. Air Force Airman 1st Class Spenser Harris, 355th Component Maintenance Squadron aerospace propulsion journeyman, prepares for a test on a T-34 engine at the test cell shop at Davis-Monthan Air Force Base, Arizona, Dec. 13, 2019. The 355th CMS test cell shop, the busiest test cell shop in Air Combat Command, ensures aircraft stay ready to complete their mission and can effectively respond to and deter any potential threat or adversary that we may face. (U.S. Air Force photo by Airman 1st Class Jacob T. Stephens)