A walk through the 'unknown' Afghanistan

Paul Salopek is one of the few people to have crossed a roadless, mountainous part of Afghanistan by foot. The journalist had previously reported there during the war. But as part of his Out of Eden walk around the world, he’s encountered a completely different Afghanistan than the one he had come to know. Hari Sreenivasan talks with Salopek about the latest leg of his journey and what’s next.