On the thirty-first anniversary of the Islamic revolution, Iran is marked by ongoing turmoil. There's pressure within from a protest movement that wants regime change, and pressure without from an international community that wants to curb Iran's nuclear ambitions. Guest host Sara Terry explores how the revolution has changed Iran and Iranians. What role do the clerics who led the revolution play in the country today? Also, an "angry" dissatisfaction with Washington, and an anniversary of a different kind. Twenty years ago today Nelson Mandela became a free man.