already older news, but I totally missed this:

Now comes the bombshell. On April 18, Moscow disclosed that it has formally handed over to the OPCW proof to the effect that the Novichok agent purportedly used in the Salisbury attack actually happens to be patented as a chemical weapon in 2015 in the US and produced in that country. (By the way, unlike Russia, the US is yet to destroy its chemical weapon stockpiles, as required under the Chemical Weapons Convention of 1997.)

http:// ronpaulinstitute.org/archives/featured-articles/2018/april/21/russia-exposes-british-lies-on-skripal-but-trail-leads-to-us/

http:// tass.com/politics/1000583