Intelligence Squared U.S. Top thinkers debate today's most important issues

ABC's John Donvan (center) moderates an Intelligence Squared U.S. debate on the motion "America Cannot and Will Not Succeed in Afghanistan/Pakistan." Chris Vultaggio hide caption

itoggle caption Chris Vultaggio

John Donvan (center) moderates an Intelligence Squared U.S. debate at New York University's Skirball Center on Sept. 21 in New York City. The motion for the debate was "Buy American/Hire American Policies Will Backfire." Chris Vultaggio hide caption

itoggle caption Chris Vultaggio