I don’t know where your dad worked, but if it was here, then it was at an actual anti-ballistic missile base.
Those silos in the foreground are for the Spartan and Sprint ABM missiles that the radar directed.
Now, those missiles were something else: the Spartan missile was based on the earlier Nike series, but with a range of 460 nautical miles and an altitude of 350 n.m. And it carried a 5 megaton nuclear warhead, just to be sure of catching those incoming MIRVs. The Sprint was a shorter range weapon with a range of only 25 miles, but it made up for that by having an acceleration of over 100 g, which meant that the motor burnt out after about 5 seconds, leaving the thing travelling at Mach 10 (fast enough to form a plasma sheath around it). It also had a nuke warhead, a low-yield neutron enhanced bomb intended to make the incoming warheads malfunction after getting caught in the flux, making this the first operational deployment of a neutron bomb.
Crazy times, crazy engineering. The pyramid damn well should be the altar of a Lovecraftian entity intent on destroying humanity. Anything less would be unworthy.
