U.S. Air Force Master Sgt. William Tittsworth, 100th Fighter Squadron F-16 Fighting Falcon crew chief, performs post flight procedures at the 407th Air Expeditionary Group in Southwest Asia, Oct. 16, 2017. Aircraft Maintenance is responsible for generation of assigned aircraft. Aircraft generation is the cumulative effort required to service, inspect, maintain, launch, and recover assigned aircraft. (U.S. Air Force photo by Staff Sgt. Sean Martin/Released)