For three years now, it’s been alleged and that Syrian government forces have systematically used helicopters to drop chlorine gas on civilians in rebel-held areas of the country. Amid repeated efforts to impose new sanctions on Syria over the widely accepted charges, another reminder was dropped on March 25: a direct chlorine attack on an underground hospital in Hama province was said to kill at least two, including a surgeon, Dr. Ali Darwish (photo at right). 
But a critical analysis of the evidence contradicts these allegations in myriad ways. Ongoing open-source research by myself and the community at A Closer Look On Syria has followed from the start. I’ve re-packaged the growing body of findings repeatedly for the OPCW, select diplomats, and the public.  Here is another attempt to provide a long but readable overview of that, in two parts. Some general problems and observations wrapping around two cases examined in detail, each of which has a family of six dying, suffices to raise the main points.
Together, the findings illustrate that, despite all the declarations of certainty, the Syrian government is almost certainly not dropping chlorine on its people. Instead, as outlandish as it may sound, it’s quite likely that Islamist opposition forces in Syria are behind all of these events. Surprisingly specific and hard-to-deny visual clues suggest rebels are murdering the victims themselves using different methods, and lodging false claims as cover, and to shift the blame. The evidence behind that is not secret, and plain enough for anyone to see. But, so far, the people in charge just haven’t looked closely enough, and no one in the media has pushed the issue. And so the true chlorine story, at least as we see it, remains unspoken and invisible to the masses, so far.