Created in the aftermath of the 1979 Islamic Revolution - the Islamic Revolutionary Guard Corps is now the most powerful organization in Iran. A parallel military force - the regime's armed wing and a major economic player - it plays a central role in repressing demonstrations, like in the widespread protests which took place recently and were submitted to a deadly crackdown. Now, the EU has inscribed the organisation on its "terrorist list". Who exactly are they? Video by: Catherine VIETTE