A South Korean F-15K Eagle comes in for fuel from a KC-135 Stratotanker. NATO's Allied Tactical Publication-56(B) procedures manual provides a single standardized source for airborne refueling procedures, regardless of the participating parties' nation of origin. The Stratotanker is from the Hawaii Air National Guard's 203rd Air Refueling Squadron. (U.S. Air Force photo by Tech. Sgt. Shane A. Cuomo)