[tacon]

Back in the day, I was an outside contractor installing a new storage system for the Livermore lab's secure computing facility. (Designing nuclear weapons) I had no security clearance. When I was present there was a rotating blue light, similar to a police car, warning people that an uncleared person was present. When I was in the facility, people would refer to the area being "dirty".

[firesteelrain]

I have never heard of anything being called dirty in those circles

[tacon]

I hardly paid much attention to "dirty", as the blue light was called "the leper light".

[firesteelrain]

That’s a new one!