Weapons Watchdog Corrects Estimate of Nerve Agent Used in U.K. Attack Fifty to 100 milligrams — not grams — of nerve agent were used in the March 4 poisoning of Sergei Skripal in Salisbury, the Organization for the Prohibition of Chemical Weapons said. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Woman at Center of South Korean Presidential Scandal Apologizes Amid Public FurorMariano Rajoy Re-elected as Spain’s Prime MinisterFire, Film, Tweet: The Taliban’s New Way of WarPopulist Wave Likely to Lift Iceland’s Pirate PartyAirstrikes Kill Dozens in Eastern YemenPowerful Earthquake Hits an Already Rattled Italy