336th FS takes off for exercise Combat Hammer in Utah Published Aug. 4, 2017 By Airman 1st Class Shawna L. Keyes 4th Fighter Wing Public Affairs SEYMOUR JOHNSON AIR FORCE BASE, North Carolina -- Approximately 12 aircraft from the 336th Fighter Squadron took off Aug. 4 to participate in exercise Combat Hammer at Hill Air Force Base, Utah. Combat Hammer is a two-week long exercise for combat and weapons testing.