Airman 1st Class Kyle Jacob, an aerospace propulsion Airman assigned the 509th Maintenance Squadron, checks fluid levels on a F-118 engine before diagnostic testing on July 9, 2019, at Whiteman Air Force Base, Missouri. Jacob and other members of the jet propulsion flight work daily to ensure the fleet of B-2 Spirits at Whiteman AFB have the engines needed to accomplish the mission, with plenty to spare, giving Whiteman the highest readiness rate across the active-duty Air Force. (U.S. Air Force photo by Staff Sgt. Kayla White)