Bruce Riedel, Author of The Search For Al Qaeda,speaks with NewsHour's Margaret Warner at the Brookings Institution.The Brookings Senior Fellow chaired the inter agency review that led tothe first Obama Afghanistan strategy. In light of voter fraud, Riedelencourages a runoff. "On the whole, it is a good thing," he said. But the Afghanistan-Pakistan expert cautions that a runoff will only be effective if it can restore legitimacy to the process.