Minot AFB Strategic Command Intrusion 1966

On August 25, 1966, a large unidentified disc-shaped object hovered over Minot Air Force Base's strategic missile fields for approximately three hours. Missile combat crew commanders in multiple launch control facilities reported the object via the emergency action line. USAF security teams scrambled to the missile fields and confirmed visual contact at 200–500 feet altitude. The craft was described as a large silent disc approximately 200 feet in diameter with rotating lights around its perimeter. During the incursion, multiple ICBM launch control centers reported simultaneous technical anomalies in their missile systems, consistent with the Malmstrom 1967 incident that would follow. The Strategic Air Command duty officer filed a classified incident report, and a NORAD scramble of interceptors from Grand Forks AFB was ordered but the craft accelerated to extreme speeds and disappeared before intercept. Project Blue Book investigated and classified the incident as 'unknown.'