916th Maintainers keep KC-135 Flying
Airman 1st Class Theodore Ehrhorn, 916th Aircraft Maintenance Squadron guidance control specialist, engages the built-in test switch in a KC-135 Stratotanker on Seymour Johnson Air Force Base, N.C., June 24, 2009. The built-in test switch checks electronic components to make sure their functioning inside the cockpit. (U.S. Air Force photo by Airman 1st Class Gino Reyes)