It's sometimes funny how those things worth with the government. I was talking to an acquaintance who worked at a company that built satellites for NRO/NSA & Friends. He could tell me things like "we had a great test of the cryocoolers last week and some of our design tweaks really improved the performance. On the other hand he wouldn't tell me what the satellite was for or even its name.

A coworker of mine went to a foreign country once on a business trip. When he asked what he could tell his wife about his trip, the guidance he got was "You can tell her either where you're traveling or why you're traveling. Not both."