An F-15 with the 67th Fighter Squadron gets refueled during the Keen Sword exercise here at Kadena Air Base, Japan, Dec. 8. Keen Sword is designed to allow the United States and Japan to practice and evaluate the coordination procedures and interoperability elements required to effectively and mutually respond to the defense of Japan, or to a regional crisis or contingency situation in the Asia-Pacific region, while building bilateral confidences and working relationships. ( U.S. Air Force photo/ Staff Sgt. Lakisha A.Croley)