Is a return to the Iran nuclear deal imminent?

Diplomats believe they're close to restoring the Iran nuclear deal, four years after the U.S. pulled out.

The European Union laid down what it called its final offer earlier this month.

Its foreign policy chief says Tehran has given a 'reasonable' response to the proposal.

All sides are waiting for the U.S. to reply.

So what are the final hurdles to a new agreement?

Presenter: Laura Kyle

Guests:

MOHAMMAD MARANDI - Adviser to the Iranian negotiation team

HAMIDREZA AZIZI - Visiting Fellow, German Institute for International and Security Affairs

ALEX VATANKA - Director and Senior Fellow, The Middle East Institute