Staff Sgt. Courtnay Hester, 386th Expeditionary Maintenance Squadron aerospace ground equipment mechanic, refuels a generator at Ali Al Salem Air Base, Kuwait, Sept. 17, 2019. From inspecting and troubleshooting to making hands-on repairs and maintaining proper standards, these professionals make sure planes are always ready for flight. (U.S. Air Force photo by Senior Airman Lane T. Plummer)