World Powers React To Iran Exceeding Limits In Nuclear Deal

French President Emmanuel Macron's top diplomatic adviser is spending two days in Tehran as part of an urgent bid to de-escalate rising tensions with Iran over its unraveling nuclear deal with world powers. Iran is now enriching uranium beyond the accord's 3.67% limit, after breaking the limit on stockpiles.

Host Robin Young speaks with Here & Now Security Analyst Jim Walsh (@DrJimWalshMIT) with the MIT's Security Studies Program.