Frontline: Obama's War

Follow Frontline correspondent Martin Smith as he ventures out to the front lines in order to offer a fresh perspective on the war in Afghanistan by asking the tough questions about a battle some say us unwinnable. Conversations with key generals, government officials, and diplomats offer varying opinions about President Obama's ambitious plan to attack terrorism at its roots, while questions about how to combat the Taliban in Pakistan - where U.S. troops are not permitted - raise interesting points about the challenges that lie ahead.