HILL AIR FORCE BASE, Utah
HILL AIR FORCE BASE, Utah - The 309th Aircraft Maintenance Group's Bret Hickenbotham, a 17-year aircraft structural mechanic, identifies various areas on the F-22 Raptor trainer here that will be affected by a modification for night, air-to-air refueling, while also inspecting its structural integrity. (Air Force photo by G. A. Volb)