The future of Saudi-Iranian relations with Vali Nasr

The international communities’ hopes for pushing back ISIS and ending the humanitarian crisis in Syria have been dealt a major blow by Saudi Arabia as it doubles down its regional rivalry with Iran. Vali Nasr, one of the world’s top authorities on the Middle East, thinks the worsening conflict between Riyadh and Tehran could be a tipping point for an already dangerously destabilized Middle East.