Iran protests continue despite brutal crackdown

Iran has executed a second protester related to the anti-government demonstrations gripping the nation. But even in the face of brutal punishments and possibly even a death sentence, the protests have continued. The regime vows to continue its crackdown. Christiane's first guest says that executions are a tactic of repression from an outdated playbook. Hadi Ghaemi is the Executive Director of the Centre for Human Rights in Iran. 

Next, we hear from Princeton professor Seyed Hossein Mousavian, a former Iranian diplomat and chief nuclear negotiator. 

Also on today's show: Lizzie Gottlieb, director of Turn Every Page, which reveals the extraordinary, 50-year relationship between her father, editor Robert Gottlieb, and Robert Caro, one of America's most widely read political biographers.

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