Shoes and socks are supposed to protect our feet, aren't they? Christopher McDougall's profile of Mexico's indigenous Tarahumara suggests that when it comes to running, we should think again. In search of running techniques that improve form and endurance, McDougall explores the ultimate minimalist solution—run barefoot. He talks with Larry Mantle about the barefoot runners he chases down for his book, "Born to Run."

Guest:

Christopher McDougall, author of "Born to Run" (Random House)