Certain Victory Air Force 1st Lt. Chris Worley, a 25th Fighter Squadron A-10C Thunderbolt II pilot, dons a “Pil Sung” helmet prior to takeoff at Osan Air Base, South Korea, April 22, 2020. Pil Sung, Korean for “certain victory,” is the 25th Fighter Squadron’s tribute to a legacy that dates back to World War II. During the COVID-19 global pandemic, the 25th Fighter Squadron follows U.S. Forces Korea’s health protection control measures to preserve their mission capabilities while maintaining a high state of readiness. SHARE: Download: Full Size (1.18 MB) Tags: SOUTH KOREA, Air Force Credit: Air Force Staff Sgt. Greg Nash VIRIN: 200422-F-OX377-1329.JPG Photo Gallery