True.
Pantex is similar to Rocky Flats where they made triggers for nukes back in the day. There were frequent protests, blocking the train tracks, etc. I worked with a fellow who was a captain in the Army who brought his troops up from Fort Carson as needed for security. He said anyone who came over the wire would be shot first and questioned later, if they survived.
Once a couple of friends and I were going to Arvada from Boulder to pick up some car parts and we took a wrong turn and ended up at the guard shack at the entrance to RF. The guard told us we needed to back up, turn around and then take the next turnoff back on the highway. We asked if we could pull forward and U-turn around the shack. He said, "No, if you do that I'll have to shoot you. Back up". I related this story to my ex-Army colleague and he said, "Oh yeah, they would have shot you immediately".