Moscow in the Middle

If the U.S. is to block Iran's nukes, it needs Russia's help. It's not doing much to get it

Sergei Guneyev / RIA Novosti for TIME

Russian President Dmitry Medvedev, left, and United States President Barack Obama.

Iran has thus far proved to be one of the most significant tests of President Barack Obama's national-security leadership. And the stakes are high: failure could mean an Iranian nuclear weapon and a Middle East arms race on the one hand, and military action by the U.S. or Israel that could inflame the region and create an Islamic backlash against the U.S. on the other. The key question is what price the President is willing to pay to avoid such outcomes.

Besides the U.S. and Iran, Russia seems to be the other major player on the nuclear issue. Whether or not...

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