"There's been no response from the Soviet government as yet to the United States ultimatum delivered to Moscow last night. The American note calls for joint withdrawal of all U.S. and Soviet forces from Iran by noon on Sunday. However, NATO observers in West Germany have reported increasing build-ups of Warsaw Pact troops and vehicles at points along the central frontier this morning. The Ministry of Defence has announced it's sending more troops to Europe to reinforce the British commitment to NATO. The first contingent left RAF Brize Norton this morning."