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:An International Final Four: Which Country Handles Student Debt Best?North Korea Issues Rare Apology Over Media Access to K-Pop ShowItacuruça Jounal: ‘Sentinel’ Dolphins Die in Brazil Bay. Some Worry a Way of Life Has, Too.Winnie Madikizela-Mandela, a Tarnished Leader of South Africa’s Liberation, Dies at 81At War: On the Road to Sinjar, Armed Men With Shifting Allegiances Decide Who Can PassAs Malaysia Moves to Ban ‘Fake News,’ Worries About Who Decides the Truth