Re: What worries me...
I believe even the Russians are very scared an atomic devices can end in some uncontrollable fanatic hands. Helping Iran to get one may work and bring money in, letting a bomb loose is something I guess they don't want, especially because there are also some terrorists who would blow up the Kremlin as well, if only they could - and once you lost one bomb to people just looking at the money, you can't really know where it ends up.