The Islamic Revolutionary Guard in Iran is both revered and feared.The 150,000 strong elite army answers directly to the Supreme Leader, and controls major businesses in Iran as well.However, it's been accused of destabilising the Middle East.The United States has designated the force as a terrorist organisation in an unprecedented move.Iran responded by calling U-S troops in the Middle East terrorists, and threatened to produce more advanced nuclear centrifuges.So what's the objective? And what will be the impact of these unprecedented declarations?Presenter: Martine DennisGuests:Mohammad Marandi - Dean of Faculty of World Studies at the University of Tehran.Trita Parsi - Professor at Georgetown University.Ellie Geranmayeh - Deputy Director of the Middle East and North Africa programme and Senior Policy Fellow at the European Council on Foreign Relations.- Subscribe to our channel: http://aje.io/AJSubscribe - Follow us on Twitter: https://twitter.com/AJEnglish - Find us on Facebook: https://www.facebook.com/aljazeera - Check our website: https://www.aljazeera.com/