Technical. Sgt. James Erickson (left) and Master Sgt. Onyx Banez check a Head-Up Display (HUD) of a C-17 Globemaster III cargo aircraft using a Display Unit Test Set (DUTS) at March Air Reserve Base, Calif. Avionics technicians install, maintain and repair electronic and electrical systems on all types of aircraft and they also maintain a high degree of readiness here to deploy worldwide to support wartime and contingency operations and operations other than war in support of national interests and objectives. (U.S. Air Force photo by Val Gempis)

Photo by Val Gempis