There were several incidents at Minot Air Force Base in North Dakota from 1967 to 1968. Originally opened in 1957 as an Air Defense Command (ADC) base, it became a major Strategic Air Command (SAC) base in the early 1960s, with both nuclear-tipped intercontinental ballistic missiles (ICBMs) and manned bombers. On March 5, 1967, a UFO appeared to hover over the area and strike teams were called in to confront the vessel.

Later that year, the Air Force claimed an unidentifiable craft “attacked” the air base, specifically the missile silos. The “attack” involved two beams of light, one of which appeared to be an offensive weapon. On June 6, 1968, a UFO hovered over a silo then left the area, but was tracked by ground and air radar. Afterwards, personnel discovered a missile was armed and in launch mode, and its nuclear warhead was armed.