South Korean air force F-15K Slam Eagle aircraft pilots prepare for an aerial refueling with a U.S. Air Force KC-135 Stratotanker aircraft over Eielson Air Force Base, Alaska, Aug. 21, 2013, during Red Flag-Alaska 13-3.
Red Flag-Alaska is a series of Pacific Air Forces commander-directed field training exercises for U.S. and partner nation forces, providing combined offensive counter-air, interdiction, close air support, and large force employment training in a simulated combat environment. (DoD photo by Staff Sgt. Jim Araos, U.S. Air Force/Released). Original public domain image from Flickr