From 1946-1992, Strategic Air Command was the operational establishment of the United States Air Force, responsible for the bomber-based, and ballistic missile-based strategic nuclear arsenal. Minot AFB, in northwestern North Dakota, was a principal SAC dual-wing base, consisting of the 5th Bombardment Wing, with 15 B-52H Stratofortress strategic bombers capable of delivering nuclear and conventional ordinance worldwide; and the 91st Strategic Missile Wing, responsible for 150 Minuteman, Intercontinental Ballistic Missiles (ICBMs) housed in underground Launch Facilities scattered across an area of 8,500 square miles. In addition, the 862nd Combat Support Group provided base security and material support to the wings. At the time, the wings were subordinate to the 810th Strategic Aerospace Division at Minot AFB, which was responsible for mission support at Minot AFB, Glasgow AFB, MT, and Malmstrom AFB, MT. The 810th SAD was subordinate to the Fifteenth Air Force, March AFB, CA, and Strategic Air Command, Offutt AFB, NE. Today both wings continue operations under the major command of the Air Force Global Strike Command. For a better understanding of the military environment surrounding the UFO events, see: Background section.