Flight Formation An Air Force B-2 Spirit bomber, two Royal Air Force F-35 Lightning IIs and two F-15 Eagles fly in formation behind a KC-135 Stratotanker during a training mission over England, Sept. 16, 2019. SHARE: Download: Full Size (0.4 MB) Tags: Air Force, Partnerships Credit: Air Force Senior Airman Thomas Barley VIRIN: 190916-F-WU042-1001A.JPG Photo Gallery