Aerospace propulsion Airmen assigned to the 509th Maintenance Squadron jet propulsion flight, train together to perform maintenance on an F-118 aircraft engine on July 9, 2019, at Whiteman Air Force Base, Mo. The flight runs diagnostic tests and perform regular maintenance on F-118 engines on a daily basis to ensure the readiness of the B-2 Spirit fleet at Whiteman AFB. (U.S. Air Force photo by Staff Sgt. Kayla White)