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Islamic State of Iraq - Wikipedia
ISIS - Leaders, Beheadings & Definition | HISTORY
Islamic state - Wikipedia
War against the Islamic State - Wikipedia
Islamic State in Iraq and the Levant - Encyclopedia Britannica
What is ISIS? Key facts about the Islamic State - NBC News
The Islamic State (Terrorist Organization) | RAND
ISIS: Everything you need to know about the group | CNN
ISIS Leader Killed: U.S. Evacuated 10 Civilians During Raid, …
The rise and fall of the Islamic State group: The long and short …