Tears, Chants, Sea Of Black: Khamenei's Funeral Procession Begins In Tehran | WATCH

A massive funeral procession for Iran's Supreme Leader Ayatollah Ali Khamenei has begun in Tehran, drawing a sea of mourners dressed in black. Described as the largest public gathering in the country's modern history, the event is expected to last between 10 and 12 hours. Helicopter images from Iranian state television show immense crowds stretching from Azadi, as citizens line the route to pay their respects to the late leader during the procession.