Nearly five years after the Assad government carried out this atrocity to regain control of the eastern Ghouta suburbs of Damascus, international investigators have finally assigned blame for it. While a good first step, there's yet a long way to go to hold those responsible accountable for their crimes, as Moscow has blocked efforts to launch an International Criminal Court investigation in Syria.
It was predictable that the OPCW would, at some point, blame Syria for the so-called Douma chemical attack after it had engaged in evidence suppression and excluded key investigators in previous reports. Once a technical monitoring body, the organization has been corrupted to serve Western interests against Damascus by validating unfounded allegations.
There's a 45% chance that a mainstream American news outlet will report that a rebel group perpetrated the 2013 Ghauta Chemical Attack before August 21, 2033, according to the Metaculus prediction community.