Who is calling the shots in Iran amid the deadly war with the US?

US President Donald Trump claimed in April that nobody knows who is in charge of Iran after the assassination of Supreme Leader Ali Khamenei and other senior officials in Israeli and US strikes. Iranian authorities reject these claims and emphasize a unified position, particularly on control of the Strait of Hormuz, where tankers and cargo ships have been attacked this month. IRGC Commander-in-Chief Ahmad Vahidi attended a farewell ceremony for Khamenei in Tehran. Deputy Foreign Minister Kazem Gharibabadi is also mentioned.