220921-F-UT528-1016
Staff Sgt. Keyli Pillaro-Estrada, 57th Aircraft Maintenance Squadron crew chief, conducts pre-flight checks on a Marine Corps F-35B Lightning II prior to a flight during Black Flag 22-2, at Nellis Air Force Base, Nevada, Sept. 21, 2022. Pillaro-Estrada, normally an Air Force F-35A crew chief, tested interoperability with the Marine Corps version, the F-35B. (U.S. Air Force photo by William R. Lewis)