I prefer authors who write techno crime thrillers, military thrillers, corporate espionage, anything with futuristic technology.
The best and most successful authors are those who keep it realistic.
It's through some of these novels that I've learned a lot about AI.
Just like atomic energy and lasers and listening technology and satellite surveillance technology the Pentagon is on it like flies on a road apple. One thing I can guarantee about human nature using the Pentagon as an example. They will use any technology humans can produce to either kill humans or imprison them.
I think a pentagram as headquarters is appropriate.