A U.S. Air Force F-16 Fighting Falcons assigned to Spangdahlem Air Base, Germany, approaches a KC-135 Stratotanker from the 100th Air Refueling Wing, in support of exercise One Sky over Poland, Sept. 19, 2018. One Sky is a three-day exercise focusing on testing command and control functions of NATO allies air centers. (U.S. Air Force photo by Airman 1st Class Alexandria Lee)

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Photo by: Airman 1st Class Alexandria Lee |  VIRIN: 180919-F-XW046-0131.JPG