TSgt. Louis Jones and TSgt. Richard Bastien, 191st Maintenance Squadron, examine a technical order during a training exercise at Selfridge Air National Guard Base, Mich., Aug. 13, 2011. The 191st MXS performed an exercise in which they simulated a KC-135 Stratotanker had damaged nose gear and a crane was needed to move the aircraft to a safe location for repair. All aircraft maintenance operations are detailed in technical orders, which are used by Airmen to ensure that aircraft are properly prepared for flight. (USAF photo by TSgt. Dan Heaton)