It makes it quite difficult to identify the origin. For example, in Skripal's case, we still don't know from where the Novichok came[1] or the assassins were Ru

It makes it quite difficult to identify the origin. For example, in Skripal's case, we still don't know from where the Novichok came[1] or the assassins were Russians or not[2][3]. 1. https://www.theguardian.com/uk-news/2018/mar/15/uks-claims-questioned-doubts-emerge-about-source-of-salisburys-novichok https://www.theguardian.com/uk-news/2018/mar/15/uks-claims-q... 2. https://www.businessinsider.in/British-military-scientists-cant-prove-that-the-nerve-agent-used-to-poison-Sergei-Skripal-was-made-in-Russia/articleshow/63600728.cms https://www.businessinsider.in/British-military-scientists-c... 3. https://www.reuters.com/article/us-britain-russia-stockpiles/secret-trial-shows-risks-of-nerve-agent-theft-in-post-soviet-chaos-experts-idUSKCN1GQ2RH https://www.reuters.com/article/us-britain-russia-stockpiles...