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ISIS - Leaders, Beheadings & Definition | HISTORY
Is It ISIS or ISIL? | Britannica
Isis | Description, Myth, Symbols, History, & Facts | Britannica
What is ISIS? What you need to know about Islamic State in ... - NBC News
Explainer: what is ISIS and where did it come from? - The …
The Islamic State (Terrorist Organization) | RAND
Islamic State of Iraq - Wikipedia
ISIS: Everything you need to know about the group | CNN
Isis, Isil, IS or Daesh? One group, many names - BBC News
What is 'Islamic State'? - BBC News