Amid the ballyhoo about this memorandum and that dossier was and who collaborated with whom to swing the 2016 election for whom, what was perhaps the most significants political revelation of the year so far in Washington went largely unreported by mainstream media. It was of course statement by US Secretary of Defense James Mattis that the U.S. had "no evidence" that the Syrian government ever used the banned nerve agent Sarin against its own people.
This assertion flies in the face of the White House (NSC) Memorandum which was rapidly produced and declassified to justify an American Tomahawk missile strike against the Shayrat airbase in Syria.
Mattis offered no temporal qualifications, which means that both the 2017 event in Khan Sheikhoun and the 2013 tragedy in Ghouta are unsolved cases in the eyes of the Defense Department and Defense Intelligence Agency. This news blog reported at the times that on the basis of what evidence was available, it seemed likely the gas attacks were launched by anti - Assad rebels as false flag attacks in a bid to turn world opinion against the Assad regime.
Mattis went on to acknowledge that "aid groups and others" had provided evidence and reports but stopped short of naming President Assad as the culprit. It must be remembered that as his troops, with help from Russia and Iran, were gaining the upper hand against the ISIS / Al nusra forces, Assad would have had nothing to gain and a lot to lose by ordering such attacks
There were certainly casualties from organophosphate poisoning in both cases. But the Obama Administration was rather too quick in accusing Assad of direct responsibility for Sarin attacks and the cocksucker-in-chief even blamed Russia's President Putin for culpability in the Khan Sheikhoun tragedy, saying he had irrerutable evidence of the Russian President's involvement.
Experienced chemical weapons experts and independent U.N. investigators such as Hans Blix, Scott Ritter, Gareth Porter and Theodore Postol have all cast doubt on "official" American narratives claiming that President Assad employing Sarin.
Now the US government's military boss has said on the record that there was no evidence to support this conclusion. In so doing, Mattis tacitly impugned the interventionists who were responsible for pushing the "Assad is guilty" narrative twice without sufficient supporting evidence, in order to justify escalation of US / NATO involvement in the conflict.