Coincidentally, I just toured the South Dakota minuteman launch control facility this week [1] and it was fascinating. The park ranger giving the tour was a veteran who manned the facility decades ago — amazing stories. You need to book tickets a few months in advance but well worth it if you’re in the area to visit Badlands, Mt. Rushmore, etc.
[1] Run by U.S. National Park Service: https://www.nps.gov/mimi/