If you do, you can't tell any of us about it, so if you do take the job, you'll have to say something like you got a job with the water service, or something..
I was in the interview process for a job at the NSA, but decided to pull out of it as I didn't like the fact that I could tell no one, not even my wife, about where I worked, or even when I would be back at the end of each day. It is no wonder that such jobs require single people with no social lives - or else end up with a high percentage of divorces.