Finnish Flight An Air Force F-15E Strike Eagle flies alongside an Air Force KC-135 Stratotanker after an aerial refueling over Finland, May 25, 2017. The aircraft are participating in Arctic Challenge 2017, a multinational exercise encompassing 11 nations and more than 100 aircraft. Air Force photo by Tech. Sgt. David Dobrydney SHARE: Download: Full Size (2.06 MB) Credit: Tech. Sgt. David Dobrydney VIRIN: 170525-F-ZX232-0045C.JPG Photo Gallery