AdvertisementCan Iran Close The World's Most Important Oil Route?03:30Download AudioResumeJanuary 11, 2012Tom BowmanfacebookEmailA member of Iran's navy participates in a drill on Dec. 28, 2011, in the Sea of Oman. Tehran is threatening to close the strategic Strait of Hormuz at the mouth of the Persian Gulf, in retaliation for new sanctions by the West. (AP)