Aircraft Refuel An Air Force KC-135 Stratotanker aircraft refuels an F-15E Strike Eagle in support of Exercise Baltic Operations, June 12, 2019. Exercise Baltic Operations is an exercise focused on joint interoperability in the Baltic region, planned and executed this year by the United States and NATO. SHARE: Download: Full Size (1.78 MB) Tags: Air Force Credit: Air Force Senior Airman Alexandria Lee VIRIN: 190612-F-XW046-0039C.JPG Photo Gallery