Context
In the summer of 1966, the grasslands north of the Black Hills held a field of Minuteman missiles. They belonged to the 67th Missile Squadron, 44th Strategic Missile Wing, Ellsworth AFB. One launch control facility, Golf One, stood 45.3 miles from the base. About 12 kilometres to its west-northwest lay Fairpoint, a small unincorporated community whose post office closed that same year.