They should just be honest and say "The Syrian Army are defeating our moderate Al-Nusra headchoppers in Eastern Ghouta, so we reserve the right to stage a chemical attack (conducted by our headchoppers) so we can launch airstrikes in contravention on the UN. So there..."

Would it really matter if Nikki Haley did tell the truth for once. It's not like the western media would ever report it !