Russian spy attack nerve agent was rare, dangerous and sophisticated

  1. Russian spy attack nerve agent was rare, dangerous and sophisticated  CNN
  2. UK says ex-spy poisoned with Soviet-developed nerve agent  Washington Post
  3. All the ways Theresa May could retaliate against Russia for the poisoning of Sergei Skripal  Business Insider
  4. Vladimir Putin’s Toxic Reach  New York Times
  5. Full coverage

https://www.cnn.com/2018/03/13/europe/what-is-novichok-nerve-agent-intl/index.html