Escalation represents dangerous spread of war and brings threat of even more damage to the global economyMiddle East crisis – live updatesParents of Iran school bombing victims describe their worst dayThe US-Israeli war with Iran has expanded with the entry of Houthi forces in Yemen, representing a dangerous spread of the conflict and bringing with it the threat of more damage to the global economy.Pakistan has said it would host a meeting of Middle Eastern powers on Monday in an effort to find a regional approach to ending the conflict. But the talks, bringing together foreign ministers from Saudi Arabia,