Six U.S. Air Force KC-135 Stratotanker aircraft assigned to the 909th Air Refueling Squadron taxi down a runway at Kadena Air Base, Japan, Feb. 15, 2013, in support of exercise Cobra Gold 2014 (CG14). CG14 is a regularly scheduled joint/combined exercise designed to ensure regional peace and strengthen the ability of the Royal Thai Armed Forces to defend Thailand or respond to regional contingencies.