Common Enemy

Lara Logan reports from the battle lines against ISIS in Iraq where the U.S. finds itself on the same side of the fight as Shiite militias backed by Iran.

In the aftermath of the attacks in Paris, France stepped up its air campaign against the Islamic State.

But on the ground in Iraq, the fight has been left to the Kurds, Iraqi security forces and Shiite militias backed by Iran -- some of those same Shiite militias that were killing and wounding American
soldiers during the Iraq War just a few years ago. Today, they have a common enemy in the Islamic State.

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