Green Lights Air Force Lt. Col. Lance Hupp flies a C-17 Globemaster III toward a KC-135 Stratotanker during a training mission over Pittsburgh, Dec. 10, 2019. SHARE: Download: Full Size (2.54 MB) Tags: Air Force Credit: Joshua Seybert, Air Force VIRIN: 191210-F-UJ876-1160M.JPG Photo Gallery