The Obama Administration's press for deeper sanctions against Iran hasn't alarmed Tehran — perhaps because the Iranians know the tactic has had checkered results

Don Emmert / AFP / Getty

The U.N. Security Council holds a debate during a January 2009 session in New York City.

In the wake of revelations that Iran had concealed a secret uranium-enrichment facility near the holy city of Qum, the U.S. began working international back channels to gauge support among its allies for a fresh round of sanctions against Tehran. While the U.S. and U.N. have sanctions in place against the Iranian finance sector as well as travel and trade restrictions, Secretary of State Hillary Clinton said the Obama Administration was investigating how to "broaden and deepen" the measures, while Defense Secretary Robert Gates noted the menu of potential punishments was a "pretty rich list to...

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