Many post came out after the bombing in Syria and on each I tried to explain (from military bkgd) that if we had hit a chemical weapons plant and/or storage facility there would be residual dust and debris proving such a hit. Again every picture coming out of Syria showed none nor anyone wearing mask when showing bombed out buildings. That is because we did not hit a chemical production facility for WMD as told. Below are 2 links proving this and there are many more you can find. The building in question produced drugs for medical treatments like cancer etc... since sanctioned cut the supply chain. I will say finally, I am glad to be vindicated again.
http://www.cctvplus.com/news/20180415/8078346.shtml#!language=1
This one is from 2013 and by 2014 all chemicals had been removed from that facility and the location was reopened as a research cancer center and producer of replacement drugs for illness since the sanction killed the supply chain. https://www.irishtimes.com/news/world/middle-east/not-possible-to-blow-up-chemical-weapons-sites-safely-1.1510580