WASHINGTON/JERUSALEM/DUBAI/DOHA — The United States and Israel launched the most ambitious attack on Iran in decades on Saturday, and Israel said Supreme Leader Ali Khamenei had been killed in the operation. Khamenei's body has been found, a senior Israeli official told Reuters. Iran called the strikes unprovoked and illegal and responded with missiles fired at Israel and at least seven other countries, including Gulf states that host U.S. bases. U.S. President Donald Trump, who made the biggest foreign-policy gamble of his presidencyafter campaigning for reelection as a "peace president", said the strikes were aimed at ending a decades-long threat from Iran and ensuring it could not develop a nuclear weapon. Trump called on Iranian security forces to lay down their weapons and invited Iranians to topple their government once the bombing ended. Israeli Prime Minister Benjamin Netanyahu said there were many signs indicating Khamenei "is no longer" and called on Iranians to finish the job. He said Khamenei's compound had been destroyed, and Revolutionary Guard commanders and senior nucle