The traditional Friday prayers have begun in the Iranian capital Tehran which this week include a memorial service for the slain Hezbollah leader Hassan Nasrallah. The main speaker in Tehran is Iran’s supreme leader, Ali Khamenei, who is expected to outine the country’s future policy towards Israel. Observers will be keen to find out whether Iran is likely to refrain from further escalating the current crisis, or take military action against its arch-enemy Israel.