Christiane Amanpour on Biden's Iran Dilemma

<p>The world waits to see how the United States will retaliate to a drone strike that killed three American troops in Jordan, after an Iran-backed militia group claimed responsibility for the attack.</p><p>Christiane Amanpour, the Iranian-British Chief International Anchor for CNN, is our star guest this week. We hear why Joe Biden now walks a tightrope between avoiding escalation in the Middle East, and projecting strength at home - all while Donald Trump looks on from the campaign trail.</p><p>Also on the podcast, Marianna tells us about her new BBC Radio 4 podcast series called 'Why...