http://www.sciencemag.org/news/2019/10/poison-used-recent-attack-russian-spy-may-soon-be-banned

U.K. investigators at the site where Sergei Skripal and his daughter Yulia were poisoned with a Novichok agent in March 2018.

The poisons were so fearsome that U.S. government scientists were forbidden from publicly uttering their name. Then, in 2018, one of the Novichok compounds was used in an attempt to assassinate a former Russian spy on U.K. soil—spurring the United States and allies to lift the veil of secrecy and mount a drive to outlaw the obscure class of nerve agents, concocted in a Soviet weapons lab during the height of the Cold War. Now, their effort to amend the Chemical Weapons Convention (CWC) is about to pay off.