Amanpour: Malcolm Gladwell, Nick Broomfield and David McCullough

Malcolm Gladwell, host of the "Revisionist History" podcast and one of the leading thinkers in the world today, joins Christiane Amanpour to talk inequality in education and the fallibility of memory. Nick Broomfield, director of "Marianne & Leonard", opens up about his film-making and the complicated relationship between acclaimed singer-songwriter Leonard Cohen and his muse Marianne Ihlen. Our Walter Isaacson sits down with David McCullough, the historian and author, to discuss his new book "The Pioneers: The Heroic Story of the Settlers Who Brought the American Ideal West".

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