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The fighting in Iraq has again exposed the split between Sunnis and Shiites. The divide was also a feature of the U.S.-led war in Iraq, especially in 2007 when deadly sectarian violence spread across the country.
That year, NPR produced a series of reports on the Sunni-Shiite split. One of the stories was done by NPR's Mike Shuster. We are rebroadcasting that piece today.
This segment aired on June 18, 2014.