An investigation into Iran's operations to kidnap and kill dissidents abroad

Reporter Fariba Nawa introduces her investigation into Iranian plots against exiles in Turkey. She tells the story of Iran's history of violence against its citizens at home, and how that violence has grown to cross international borders today. The fate of a dissident in France becomes a blueprint for the questions she seeks to answer in an investigative series by The World and On Spec Podcast, called "Lethal Dissent."