File photo of a fighter from the Shi’ite Badr Brigade militia wearing a religious flag as he guards a checkpoint outside the town of Amerli

A fighter from the Shi’ite Badr Brigade militia wears a religious flag as he guards a checkpoint recently taken from militants of the Islamic State outside the town of Amerli, in this September 5, 2014 file photo. REUTERS/Ahmed Jadallah/Files

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