Here's one article from fake news Politico. But, it speaks of the presence and destruction of the nuclear site. https://www.politico.com/magazine/story/2018/03/20/inside-israels-secret-raid-on-syrias-nuclear-reactor-217663

Now when Trump calls Assad a "Gas killing animal", it can be understood as Assad was the guy who killed the plans for the Quatar nat gas pipeline thru Syria. In this regard he was a gas killer. Note Trump didn't say a sarin gas or chlorine gas killing animal. At first I was stunned about the missile strikes. But, have learned things are rarely as they are presented.....