Jet engine mechanic Staff Sgt. Tonya Page, 718th Aircraft Maintenance Squadron, reviews technical orders before beginning an engine run on a KC-135 jet during the Valiant Shield exercise at Andersen Air Base, September 14th, 2010. This joint service exercise focuses on training and interoperability while responding to a range of mission scenarios. (U.S. Air Force Photo/Staff Sgt. Lakisha A. Croley)