Airman 1st Class Javier Farcia-Bustos waits for an F-35A pilot assigned to the 442nd Test and Evaluation Squadron to complete pre-flight checks on the flight line at Nellis Air Force Base, Nevada, Sept. 21, 2021. The 442nd and 59th Test and Evaluation Squadrons led Air Combat Command’s portion of a nuclear design certification test with maintenance support from the 57th Aircraft Maintenance Squadron and Bolt Aircraft Maintenance Unit. (U.S. Air Force photo by Airman 1st Class Zachary Rufus)