Start your engines!
Staff Sgt. Donterrio Erby, a 455th Expeditionary Aircraft Maintenance Squadron aerospace propulsion technician, secures a panel onto an F-16 Fighting Falcon at Bagram Airfield, Afghanistan, June 16, 2017. Aerospace propulsion technicians diagnose engine problems, which includes the fuel, oil, electrical and engine airflow systems, and recommends a course of action on how to fix them. Erby is a native of Columbus, Mississippi. (U.S. Air Force photo by Staff Sgt. Benjamin Gonsier)