Hugh Shelton; Davis Guggenheim; Clayton Christensen

General (Ret.) Hugh Shelton, a veteran of every U.S. military campaign since Vietnam, shares insights on Iraq and Afghanistan and discusses his biography, "Without Hesitation: The Odyssey of an American Warrior." Davis Guggenheim discusses his documentary of the public education system, "Waiting for 'Superman,'" which follows five children hoping to win spots in NYC charter schools. Harvard professor Clayton Christensen discusses personal responsibility and his book, "The Innovator's Prescription," which deals with the health care system.