U.S. Air Force Staff Sgt. Ryan Kemp, 351st Air Refueling Squadron boom operator, performs a pre-flight inspection during Exercise Baltic Operations, at RAF Mildenhall, England, June 19, 2019. The BALTOPS Exercise is a U.S. exercise focused on joint interoperability in the Baltic Region, planned and executed this year by the U.S. and NATO. (U.S. Air Force photo by Senior Airman Alexandria Lee)

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Photo by: Senior Airman Alexandria Lee |  VIRIN: 190619-F-XW046-0081.JPG