The mainstream Western media seems entirely convinced that the propaganda arm of ISIS and al Qaeda, variously described as "activists" and often represented by White Helmets, which works solely in rebel territories and recently was forced to apologize for publishing fake photos of a fake attack, are to be believed.
The Russian explanation, that Syrian aircraft bombed an "opposition" ammunitions factory which then released chemical weapons is being roundly rejected, although as of June 2014, Syria was found by the Organization for the Prohibition of Chemical Weapons (OPCW) to have removed all its chemical weapons: "OPCW chief Ahmet Uzumcu stated nearly 3 years ago:
"A major landmark in this mission has been reached today. The last of the remaining chemicals identified for removal from Syria were loaded this afternoon aboard the Danish ship Ark Futura," Uzumcu told a news conference in The Hague.
The bulk of Syria's chemical stockpile had already been shipped out of Latakia, part of a multi-million-dollar operation involving some 30 countries.
Syria agreed last September to destroy its entire chemical weapons program under a deal negotiated with the United States and Russia..."
The original reports, in view of this, was that the chemical weapon that Syria had dropped on civilians, was chlorine, a chemical not banned (though banned as a weapon). Doctors and other experts at the site now admit the evidence is that the chemical released was sarin.
It is worth recalling that the sarin attack at Ghouta was found, as Seymour Hersh reported in an article no US publisher would touch, "Red Lines and Rat Lines", not to be from Syrian sources. British intelligence had found that the sarin used could not have been from the Syrian government inventory, leading to the implication that it was part of the "rebel" inventory, the same kind no doubt released in the recent incident, which the "opposition" has been able to obtain thru Turkey and other sources, as is well-documented.