Research news
Bitesized UFOs #061: UFO Over Montana Missile Silo, February 1975
February 1975: a night of UFO sightings around Harlowton, the town around where the Minuteman silos of the 490th Strategic Missile Squadron were located, culminated with an object hovering over a launch facility. Air Police and local law enforcement officers witnessed the UFO - and others, over a period of several hours. A civilian also reported being followed along a rural road by a strange object carrying lights. Hear about these strange sightings in the latest episode of Bitesized UFOs.
See more (external link) 
https://www.youtube.com/watch?v=s-2bd14cPtg