Double Duty Air Force Airmen 1st Class Vincent Lancia and Sinjin Bunag tighten bolts on an external fuel tank at Kunsan Air Base, South Korea, Dec. 8, 2020. SHARE: Download: Full Size (0.5 MB) Tags: Air Force, Training Credit: Air Force Staff Sgt. Kristin High VIRIN: 201208-F-BX159-0009C.JPG Photo Gallery