Rashid Rauf, the 25-year-old Pakistani-born, British-raised baker's son fingered as the central figure in the foiled plot to bomb U.S.-bound flights from London, has been described as friendly and ordinary. But Pakistani security officials familiar with Rauf's interrogation tell TIME that the plan's real mastermind may be anything but--the man who gave Rauf his marching orders is believed to be a senior al-Qaeda operative who may be a top aide to the terrorist group's No. 2, Ayman al-Zawahiri. They would not name the aide, but an official said it was a possibility al-Zawahiri himself may have approved the plane-bombing plan.
That...