The Iranian president, a hardliner who was touted as a potential successor to the country's supreme leader, was returning from neighbouring Azerbaijan when the helicopter carrying him and his foreign minister suffered a hard landing. President Ebrahim Raisi was instrumental in the recent crackdown against protesters demanding freedom for women in Iran. Even as news of Raisi's fate remains uncertain, critics of the regime aren't mincing their words. Redmond Shannon reports on the frantic search effort for Iran's head of state.