S. Popov: Someone is hired for a job and he's told that the institute does science that is, let's say, not strictly academic. Well, that makes sense, because there are other problems to solve. Industrial formulae need to be produced and production technologies developed. So they say that in this case your work will include a certain amount of information that you shouldn't disclose. It will include trade secrets. So, okay, a lot of people are all right with that. Yes, indeed, in the Soviet Union there was an aversion to disclosing industrial secrets. Then the management of the institute observes the new employees and decides to call them in for a talk. One or two people are selected to meet with the director of the institute and a representative, a deputy director from the KGB overseeing the institute. These people meet up and talk with the new employees, and tell them that they're delighted with their successes, that they're excellent at what they do and that they are deserving of professional advancement. And of course they are presented with new, more important work to do. Well, of course this more interesting and important area requires, kind of, greater constraints. And for that, probably... probably if someone wants to make a foreign trip then that person has to get permission, that's all. If you want to talk with people you know about what you do at work, well then, please do that the way we tell you to. Usually that didn't spark any... any great concern in people. People signed the relevant documents and then things would go a step further. In that sense... it's just that those people who were chosen for professional advancement were given a special document to read, that was stamped "Top Secret," or something.