The rationale keeps changing – from Iran planning a preemptive strike to lobbying by IsraelUS-Israel war on Iran – live updatesIt took months for the Bush administration’s falsehoods about weapons of mass destruction in Iraq to come to light, after an invasion, regime change, an investigation, and then, finally, the truth. For the Trump administration’s warnings of an imminent threat from Iran, it took an afternoon.On Capitol Hill on Monday, the US secretary of state, Marco Rubio, swiftly underc...