How wss the director of the film able to reach tony yates while fbi couldnt ?

This is my first review and please forgive my errors in writing, as English is not my native language and also my critical mind. This was just sad for me, as a Romanian, because the story with the submarine was a satire to all the other things that could be sold to the higher bidder in the Eastern Block after the collapse of the USSR or after the fall of comunism earlier in '89, here in Romania. The situation was critical on all aspects. The inflation was booming and with a paycheck of one month, you could buy an apartment, a car, a small factory and so on. The factories, all the industries were sold to the "smart boys" and in a matter of years, we were left with nothing. All the comunist era bosses were getting richer and richer, while the rest of the country was collapsing under poverty. So, this documentary was just a perfect metaphor for all the other countries ex-comunist, which practiced this thing. Every good that country had, was an esset ready to be sold. Of course, those things were known only by those who were part of that system; the common folk didn't knew this kind of stuff. As a country, Romania suffer after those lost things even after 30 years of freedom.