How does Iran-Saudi Arabia crisis affect Mideast diplomacy?

Aired: 1/4/2016 | 0:07:23 | Clip
Why did Saudi Arabia execute a prominent Shiite cleric if it knew that it would inflame tensions with Iran? Judy Woodruff gets analysis of what that rivalry means for the region from Vali Nasr of John Hopkins University and Randa Slim of the Middle East Institute.

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