U.S. Air Force Airman 1st Class Kevin Annis, 94th Fighter Squadron crew chief, conducts maintenance on an F-22 Raptor through a Portable Maintenance Aid (PMA) at Joint Base Langley-Eustis, Virginia, May 18, 2021. Crew chiefs ensure aircraft are readily deployable at a moment’s notice. (U.S. Air Force photo by Senior Airman Alexandra Singer)