An Iraqi Shiite fighter chants slogans against the Islamic State of Iraq and Syria during Friday prayers in the Shiite holy city of Karbala, 50 miles south of Baghdad on Friday, July 11, 2014.

AP

An Iraqi Shiite fighter chants slogans against the Islamic State of Iraq and Syria during Friday prayers in the Shiite holy city of Karbala, 50 miles south of Baghdad on Friday, July 11, 2014.