@jwz I was doing a consulting gig where I met a guy who, upon learning that I lived in DC, said he'd worked for a place he couldn't name when he got out of college. When I said, "Oh, must be NRO, they have this weird belief that they're a lot more secret than they really are" he just stuttered for 5 minutes.
Traffic was better around there before their cover got broken though. Hundreds of acres of empty fields surrounded it and are now filled with SAIC office buildings.