Paul Krugman; Bernard-Henri Lévy; Massimo Bottura

Nobel laureate and journalist Paul Krugman, an early critic of Barack Obama on the left, describes why he changed his position and considers President Obama to be one of the most influential and successful presidents in American history. Writer and philosopher Bernard-Henri Lévy examines the rise of Putin in Russia and ISIS in the Middle East and the responsibility he believes lies on Europe to address them both. Chef Massimo Bottura, whose restaurant Osteria Francescana is ranked third best in the world, shares his new book, "Never Trust a Skinny Italian Chef."