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Iranian Kurds hold Kurdish flags as they take part in a gathering to urge people to vote in the upcoming independence referendum in the town of Bahirka, north of Arbil, the capital of the autonomous Kurdish region of northern Iraq, on September 21, 2017.
The controversial referendum on independence for Iraqi Kurdistan is set for September 25. / AFP PHOTO / SAFIN HAMED        (Photo credit should read SAFIN HAMED/AFP/Getty Images)
Iranian Kurds hold Kurdish flags as they take part in a gathering to urge people to vote in the upcoming independence referendum in the town of Bahirka, north of Arbil, the capital of the autonomous Kurdish region of northern Iraq, on September 21, 2017.
The controversial referendum on independence for Iraqi Kurdistan is set for September 25. / AFP PHOTO / SAFIN HAMED        (Photo credit should read SAFIN HAMED/AFP/Getty Images)

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    Iraqi Kurds casting votes on independence

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Iraqi Kurds casting votes on independence

Iraqi Kurds head to the polls to vote in an advisory referendum on independence from Iraq. CNN's Nima Elbagir has more.

Iraqi Kurds casting votes on independence

Iraqi Kurds head to the polls to vote in an advisory referendum on independence from Iraq. CNN's Nima Elbagir has more.