Mole posed as suicide bomber, disrupted bomb plot against US-bound planes.The would-be suicide bomber dispatched by the Yemen branch of al-Qaeda last month to blow up a U.S.-bound airliner was actually a double agent who infiltrated the terrorist group and volunteered for the suicide mission, U.S. and foreign officials said Tuesday.In an extraordinary intelligence coup, the agent left Yemen, travelling by way of the United Arab Emirates, and delivered both the innovative bomb designed for his air attack and critical information on the group’s leaders to the CIA, Saudi and other foreign intelligence agencies.