Aircraft hydraulic technicians with the 446th Aircraft Maintenance Squadron, McChord Field, Wash., troubleshoot, remove, repair, overhaul, inspect, and install aircraft hydraulic systems and components on C-17 Globemaster III aircraft, during the Reserve weekend, April 30, 2011. They must also have a sense of humor, be flexible and be willing to get their hands dirty to ensure aircraft are safe and ready to go. (U.S. Air Force Photo by Staff Sgt. Nicole Celestine)