The United States and Iran traded fire for a second consecutive night, in what amounts to a more dangerous phase of the war in the Persian Gulf and raises the prospect of a return to open hostilities. As US forces again struck Iranian targets, the Revolutionary Guard said it had hit bases with a US presence in the region, and Iran's General Staff announced the "absolute" closure of the Strait of Hormuz. President Donald Trump threatened new strikes on Thursday if Tehran does not accept his conditions for peace.