December 28th, 2011
04:51 PM ET

U.S. nearing tipping point with Iran?

With Iran threatening to cut off access to an important artery for the global oil trade, the U.S. Navy says such a move "will not be tolerated," and experts warn military action could be inevitable if Iran carries out its threat. Foreign Affairs Correspondent Jill Dougherty takes a look at the situation.

Filed under: Iran • Security Clearance on TV