Amanpour: Gérard Araud, Jane Harman, Al Gore and Kevin Sneader

Gérard Araud, the former French Ambassador to the U.S. and the UN, and Jane Harman, the President and CEO of the Wilson Center, join Christiane Amanpour in New York to discuss President Trump's speech at the UN General Assembly, the constitutional crisis Boris Johnson faces at home and House Speaker Pelosi starting the impeachment process. Al Gore, the former U.S. Vice President, discusses the UN climate summit and the action world leaders now need to take to stop the crisis. Our Walter Isaacson talks to Kevin Sneader, the Global Managing Partner at the consulting firm McKinsey & Company, about the company's involvement with the opioid epidemic.

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