Seventy-two hours on from the bombing of Beirut and the killing of Hassan Nasrallah, the leader and figurehead of the Iranian-backed militant group Hezbollah, Israeli air strikes have continued relentlessly on three fronts: in Lebanon, Gaza and Yemen. Israel's military thinks it has Hezbollah on the ropes, assassination after assassination, with the senior chain of command effectively wiped out according to the US. The Hamas leader in Lebanon was killed this Monday. Central Beirut was hit for the first time too, with the leaders of another Palestinian militant group killed there.