Porton Down lab claims no toxins could have escaped it’s “four walls,” but has never denied the possession of the nerve agent used on the Skripals, the Russian Embassy said, urging the UK to disclose its chemical warfare program. The origin of the mysterious nerve agent, used on March 4 to poison former Russian double-agent … Continue reading ‘No way’ nerve agent could escape UK lab? Russia demands info on Porton Down toxin research — RT UK News