Well, I suppose you can't know for sure! I've seen that referred to in a lot of places, though, and I do think it would be very, very difficult to keep an entire programme like that a secret--the world's intelligence agencies knew of the existence of the KGB illegals before any of them had ever been caught, for example. So if someone else had an entire elaborate illegals-style programme, it would be known, or at least rumoured.
no subject
Date: 2014-03-02 01:56 pm (UTC)-J