Iran Sanctions; Ian Bremmer; Jeremy Rifkin; Umberto Eco

Journalists David Ignatius of The Washington Post and Jay Solomon of The Wall Street Journal join Vali Nasr of Tufts University to analyze the sanctions placed on Iran to stop the building of nuclear weapons. Political scientist Ian Bremmer of Eurasia Group details the group's recent "Risk Report," which examines the political and economic risks facing the world in 2012. Jeremy Rifkin, president of the Foundation on Economic Trends, presents his new book, "The Third Industrial Revolution," which examines the convergence of internet technology and energy. Philosopher Umberto Eco shares his latest novel, "The Prague Cemetery," focused on Semitism and conspiracy theories.