caption: A U.S. Air Force KC-135 Stratotanker changes lead formation Nov. 1, 2017, during a training mission for Tartan Flag, a Royal Air Force exercise in preparation for Red Flag 2018. The 100th Air Refueling Wing provided aircrew and maintainers in support of Tartan Flag Oct. 30 to Nov. 3. (U.S. Air Force photo by Senior Airman <PERSON>)
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