Leaders from Iran and across the world gathered in Tehran to pay their final respects to former Supreme Leader Ayatollah Ali Khamenei. The funeral ceremonies drew presidents, prime ministers, military officials and religious leaders, highlighting the significance of the event.(PICS/AFP)

Iran has begun the official mourning ceremonies for Supreme Leader Ali Khamenei after his body arrived at Tehran's Grand Mosalla religious complex ahead of a state funeral expected to draw millions of mourners and foreign dignitaries. (PICS/AFP)