Iran's Supreme Leader Ayatollah Ali Khamenei has been killed after Israel and the US launched a "massive" and ongoing attack against Iran's leadership and military. US President Donald Trump has urged Iranian forces to lay down their arms, and for Iran's people to rise up against its government. Iran has responded by firing ballistic missiles and drones at US assets and allies across the region, targeting Israel, Bahrain, Kuwait, Qatar, the United Arab Emirates and Jordan. On Sunday, Israel said it had launched fresh attacks on "the heart of Tehran", as Iranian attacks across the region also continued. Here's what we know. Why have the US and Israel attacked Iran? Trump has said the aim of the operation is to "ensure that Iran does not obtain a nuclear weapon". We're going to destroy their missiles and raze their missile industry to the ground. It will be totally again obliterated," he said in an eight-minute video posted on...