U.S. Air Force Airman 1st Class Brelee Mercer, 33rd Maintenance Group maintenance scheduler, organizes the weekly maintenance calendar at Eglin Air Force Base, Florida, March 9, 2021. Maintenance schedulers for the F-35A Lightning II use the autonomic logistics information system (ALIS) to plan maintenance, analyze technical data and various other support services. (U.S. Air Force photo by Senior Airman Heather LeVeille)