Britain Says It Has Proof Russia Stockpiled Lethal Nerve Agent Foreign Secretary Boris Johnson said on Sunday that Russia has been researching military-grade nerve agents for use in assassinations. Russia denies it. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Your Tuesday BriefingWhat We Know and Don’t Know About the Sri Lanka AttacksThis Estonian Start-Up Has Become a Thorn in Uber’s SideSri Lanka Attacks: Nation On Edge Mourns VictimsLetter 103: In Australia, Are All Historic Losses Treated Equally?Live Briefing: Sri Lanka Bombings Live Updates: Dozens of Suspects Are Arrested as Nation Mourns