U.S. Air Force Airmen from the 100th Air Refueling Wing review a preflight checklist for a KC-135 Stratotanker prior to a flight to Keflavik Air Base, Iceland, at RAF Mildenhall, England, Aug. 10, 2018. The 100th Air Refueling Wing supported deployed Airmen and aircraft from the 48th Fighter Wing in support of NATO’s Icelandic Air Surveillance mission. The U.S. has conducted this NATO mission in Iceland annually since 2008. (U.S. Air Force photo by Airman 1st Class Alexandria Lee)

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Photo by: Airman 1st Class Alexandria Lee |  VIRIN: 180809-F-XW046-0007.JPG