Fareed Zakaria, the editor of Newsweek International and former host of public television's Foreign Exchange has written nearly a half dozen books and appeared as an analyst and expert on programs such as ABC News and This Week with George Stephanopoulos. This summer, he launches Fareed Zakaria GPS, a new program about international affairs on CNN. His latest book, The Post-American World, is a critical look at American foreign policy and an examination of what he calls "the rise of the rest". Host Enrique Cerna has a blunt conversation with Zakaria about his book and the greatest threats facing America today.