Iranian President Ebrahim Raisi, a protege of Supreme Leader Ali Khamenei, as well as Foreign Minister Hossein Amir-Abdollahian were killed in a helicopter crash on Sunday. The pair were returning to Tehran after attending a ceremony with Azerbaijani President Ilham Aliyev on the Iran-Azerbaijan border to inaugurate the building of the new Qiz Qalasi Dam. [time-brightcove not-tgx=”true”] Khamenei said that the country would undergo a five-day mourning period.