Vast crowds of Iranians loyal to the Islamic republic massed in Tehran on Saturday to begin almost a week of funeral ceremonies for slain supreme leader Ali Khamenei, which authorities hope will send a message of defiance to the West after the war with the United States and Israel. Clad in black and waving blood-red flags seen as a call for vengeance and justice under Shia Islam, mourners thronged the Grand Mosalla religious complex in the Iranian capital. Khamenei, who had ruled Iran since 1989...