Joe Biden has said he would not support an Israeli attack on Iranian nuclear sites, as the US sought to temper Israel’s response to Iran’s missile attack on Tuesday and contain a rapidly escalating regional conflict. Biden’s comments came after the top Israeli diplomat at the UN warned his country’s retaliation for an Iranian salvo of nearly 200 ballistic missiles would be heavier than Tehran “could ever have imagined”. On the same day, the Israeli chief of staff, Lt Gen Herzi Halevi,...