And you know this, how?
Yes, I'd like to know about this "academic culture" that allowed scientists working on super secret programs to take their work home with them? I could just as easily assert that it was strictly prohibited, but difficult to enforce if scientists were inclined to be dishonest. And that is the problem. If our super secret labs allow foreign nationals of even slightly questionable loyalty to work in them, then they ask for this kind of espionage.