Huge crowds have gathered in Tehran for the funeral of Iran's late supreme leader Ali Khamenei, with millions calling for 'revenge' against the US. Khamenei ruled the Islamic republic from 1989 until he was killed aged 86 in an airstrike on the first day of the US-Israeli war with Iran on February 28. Today's service at Tehran's Grand Mosalla complex was led by prominent Shia cleric Ja'far Sobhani, a 97-year-old scholar. It came one day after mourners flooded the streets of Tehran chanting 'death to America!' over Khamenei's killing. As authorities unveiled the casket containing his body in a glass...