Who Is Islamic State and How Did They Get This Big?

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caliphate – n. a political-religious Muslim government or state

refinery – n. a place where the unwanted substances in oil are removed

believer – n. someone who regards the existence of God as a fact; someone who has religious beliefs

crucify – v. to kill (someone) by nailing or tying his or her hands and feet to a cross

reward – n. something that is given for something that has been done, or that is offered for something that might be done

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