Elmendorf Air Force Base, adjacent to Anchorage, is the largest Air Force installation in Alaska and home of the Headquarters, Alaskan Command (ALCOM), Alaskan NORAD Region (ANR), Eleventh Air Force (11 AF), and the 3rd Wing. The Eleventh Air Force's three groups and constituent squadrons maintain the defense capability and remote operating sites throughout Alaska. The 3rd Wing's four groups, supporting five flying squadrons, constitutes the bulwark of North Pacific defense.