What is Novichok, nerve agent used in attack on ex-spy?
LONDON — The use of Russian-developed chemical nerve agent Novichok to poison ex-spy Sergei Skripal and his daughter makes it “highly likely” that Russia was involved, British Prime Minister Theresa May said Monday. Novichok refers to a class of nerve agents developed in the Soviet Union near the end of the Cold War. The agents were ostensibly created in an…