nic robertson is in the saudi capital of riyadh and, nic, let me start with you. one of those close allies, saudi arabia, calling, echoing those calls for restraint. just how concerned is riyadh that the trump administration seems to be upping the ante instead of showing any sense of de-escalation at this point? >> yeah. i think there is concern here because one of the sort of longer concerns about being so closely supported of president trump, but not having knowingly having a huge amount of influence over him is that while saudi arabia and the united states are aligned at the moment in their view of iran as a destabilizing influence spreading instability throughout the region, that's certainly saudi arabia's view and been on the front line of iran's anger and attacking the oil refineries