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Three U.S. Navy planes connected for in-flight refueling: Two Douglas KA-3B Skywarrior (BuNos 142654, 142665) from the Heavy Attack Squadron VAH-11 Checkertails and a Douglas A-4E Skyhawk (BuNo 149992?) from Attack Squadron 81. Normal inflight-refueling is only performed between two planes, this was a stunt performed for the photographer. This is also sometimes referred to as a "daisy chain" by participants. 
