Everyone knows the secret, underground nuclear ballistic submarine base at Ft. Smith, AR has a very powerful ballistic missile radar at it that tracks SLBMs launched from the Southern Hemisphere. EVERYONE!
That’s photo is from Cape Cod AFS that has the Sub Ballistic Missile Tracker. They call it Pave Paws.
https://en.wikipedia.org/wiki/PAVE_PAWS
A very early version was built at Eglin AFB, FL. When it caught fire the firemen and trucks showed up but the security refused them access and the place burned.