U.S. Air Force Senior Airman Alexander Stillinger, 58th Aircraft Maintenance Squadron avionics specialist, performs a pre-flight inspection on Kirtland Air Force Base, New Mexico, June 9, 2020. Stillinger is the dedicated crew chief for aircraft 5759, which received a ‘Black Letter’ for having zero maintenance discrepancies. (U.S. Air Force photo by Airman 1st Class Ireland Summers)