US President Donald Trump says Iran’s Supreme Leader Ayatollah Ali Khamenei “is dead”. His claim came hours after Israel and the US launched an attack on Iran and followed reports quoting Israeli officials as saying that Khamenei had been assassinated. But, subsequent Iranian media reports said that Khamenei was “steadfast and firm in commanding the field”. Khamenei, 86, became Iran’s highest authority in 1989, following the death of the Islamic Republic’s founder, Ayatollah Ruhollah Khomeini...