Might be useful, especially in the Last Submarine arc.
https://en.wikipedia.org/wiki/Post-A...cility,_Hadley
I got to tour this facility in 1994 or so, since I was a firefighter in the community and we might have to haul someone out of a confined space inside. It had a 1960s and 1970s computer room (no systems, but MASSIVE power relays) and a war room with "the big board" reminiscent of Dr. Strangelove. Plus a shielded entrance in the notch between 2 hilly ridges. About 20 miles or so from Westover AFB and mostly unknown to the locals, even after the colleges bought it in 1990 or so.