Russian spy attack nerve agent was rare, dangerous and sophisticated

Russian spy attack nerve agent was rare, dangerous and sophisticated  CNN UK says ex-spy poisoned with Soviet-developed nerve agent  Washington Post UK, allies point finger at Russia in ex-spy poisoning  Yahoo News What A Brave Russian Scientist Told Me About Novichok, The Nerve Agent Identified In The Spy Attack  NDTV As Putin's Opponents Flocked to London, His Spies Followed  New York TimesFull coverage

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