Iran said today that it has successfully tested a new medium-range missile in defiance of warnings from Washington that it is ready to ditch a landmark nuclear deal over the issue. <br/><br/>State television carried footage of the launch of the Khoramshahr missile, which was first displayed at a high- profile military parade yesterday.<br/><br/>It also carried in-flight video from the nose cone. The broadcaster gave no date for the test although officials had said yesterday that it would be tested soon.