America’s targeted killing of Iran’s top general, Qasem Soleimani, has spread new fears of war across the Middle East. The key protagonists are in Washington and Tehran, but the main stage for the conflict may well be Iraq, as Soleimani was assassinated in Baghdad. Iraq is now under intense pressure to pick sides. Stephen Sackur interviews Ayad Allawi, who was the country’s vice-president twice. Does the current crisis spell disaster for Iraq?