Well, I can assure you that it did not include everyone who was stationed at Utapao. I worked aircraft avionics and certainly saw the "secret recon gear" nearly every day, as did all of the Thai workers, food vendors, house girls, trash collectors, etc. And they certainly did not hold top secret clearances. I had the quite standard secret clearance as did almost everyone who worked on aircraft, and I seriously doubt that all those Thai workers had those clearances either. Certainly the townsfolk working off base did not have any clearances, yet those folks used paper bags made out of recycled secret tech manuals! If you wanted to spy all you had to do was buy something in town and read the bag. You could have found out all about the inner workings of the B52s of the day.
I spent most of my military time in SAC, never needed a top secret clearance though I knew some who did, crypto, etc., even though I worked on nuke loaded aircraft.
Nothing personal, but if you got this much wrong, it makes we wonder about your other assertions.