Did the Soviet Union Use Chemical Weapons?

There was one episode I think that kind of summed it up for you. We ended up investigating the idea that post Vietnam the Soviet Union used chemical weapons on the long villagers in the mountains of Laos. The problem was that some western scientists went there and measured to see if there were in fact chemical weapons being used didn't find any chemical weapons. And then basically figured out, I mean I should call it a theory I guess, that in fact what was being mistaken as chemical weapons was beepoop. That was the theory that was what the western scientists said. But you had a problem with that too.