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Sunni Versus Shia In The Muslim World: How We Got To Now

Iran and Saudi Arabia are arguably the two most powerful forces in the Middle East. And their decades of conflict have fueled much of the region’s unrest. Martin Smith joins us to talk about the current state of their relationship – and how we got to now. His two-part Frontline documentary airs Feb. 20 and 27 on KERA-TV.