Why U.S. and allies can’t afford to let Kobani fall to IS

Aired: 10/20/2014 | 0:05:19 | Clip
Why did the U.S. decide to reinforce Syrian Kurds with lethal aid to fight the Islamic State takeover of the town of Kobani? Chief foreign affairs correspondent Margaret Warner joins Gwen Ifill to discuss reversals by the U.S. and Turkey in the strategy against the militant group.

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