The United States falls into a trap in assuming that Russia doesn't want a nuclear-armed Iran. Russian officials repeat over and over that they have no evidence that Iran has a weapons program. US officials discount that statement but shouldn't. The United States needs to remember that Russia has nuclear engineers inside Iran working with the Iranians. also exchanged e-mails on this subject with a former European ambassador to Tehran. His made a very interesting point. Iran is the only potential competitor for natural gas to Europe. He said Moscow doesn't want Tehran to get too close to Europe to the point it could jeopardize Europe's dependence on GAZPROM. We've seen the evidence of Russia and GAZPROM leverage over Europe recently.