Watch: Crowds march through Tehran during funeral procession for Iran's slain Supreme Leader

Watch: Crowds march through Tehran during funeral procession for Iran's slain Supreme Leader Aerial footage from the funeral procession of Iran's late Supreme Leader, Ayatollah Ali Khamenei, on Monday showed hundreds of thousands of people marching through the streets of Tehran. Iranian media estimated that millions gathered in the capital to mourn the slain leader. Aerial footage from the funeral procession of Iran's late Supreme Leader, Ayatollah Ali Khamenei, on Monday showed hundreds of thousands of people marching through the streets of Tehran.