Some of the scenes in Armando Iannucci’s new film, ‘The Death of Stalin,’ seem a bit over the top. But Iannucci says says he actually had to downplay the real story to make it believable. The political satirist behind ‘The Thick of It’ and ‘Veep’ tells us about his first time working on a project based on real people and how he had to work to balance comedy and terror when writing about the chaos that followed Stalin's death in 1953.