PBS NewsHour

How the Islamic State rose from prison to be a global group

Clip: 11/23/2015 | 7m 13s

Where did the Islamic State come from? Joby Warrick, author of "Black Flags: The Rise of ISIS," joins Jeffrey Brown to define the militant group’s origins and its transformation into an international organization.

Aired: 11/23/15

Rating: NR

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