The new US administration is setting out on a collision course with Iran. Team Trump has already imposed new sanctions on Tehran, threatened to rip up the nuclear deal, and accused the country of sponsoring terrorism. As Iran goes ahead with new ballistic missile tests and the tone in Washington grows tougher, is the fragile peace between Iran and the US in jeopardy? And can the hard-fought nuclear deal survive the tensions? We ask the man who negotiated the agreement for Iran, former head of the Iranian National Security Council’s Foreign Relations Committee and professor at Princeton university – Seyed Hossein Mousavian.

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