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'An ongoing threat' against Western countries

05:19

Today, Yemeni authorities said they foiled an Al Qaeda plot to attack commercial oil and gas facilities and take over area ports. U.S. officials tell NBC News they do not discount Yemen's claim about disrupting a plot-- but say that plot is unrelated to the ongoing threat against Western interests. Meanwhile, the President addresses the ongoing war on terror on "The Tonight Show", and with troops at Camp Pendleton.  NBC News Chief Foreign Correspondent Richard Engel reports on the latest happening in Yemen.