Tehran “continues its unprecedented and grave nuclear escalation,” according to Britain, France and Germany…Iran has begun enriching uranium close to weapons-grade levels, according to a report released by the United Nations nuclear watchdog Wednesday, sending Tehran closer to becoming a nuclear power…The International Atomic Energy Agency, or IAEA, said in its report that Iran had produced uranium particles that were enriched up to 83.7% purity at its Fordo fuel enrichment plant south of Tehran.