Nope.
Douma being part of Ghouta, the rebels/terrorists already surrendered and was being bussed out. Only the rebels in Douma was holding out.
They was holding out because they had over 4000+ hostages that they held in underground prisons and that they paraded in cages many years ago, used as human shields and was using them as bargaining chips in the negotiations.
Only two weeks ago, they released a video to show some of them underground as a proof of life video.
These hostages come from many backgrounds, due to the war, all likely had family members in the SSA. No one is going to gas their own families.
There was no chemical attack by the SSA. It served absolutely no tactical sense, while on strategic table, it's insanely bad for them.
The negotiations with the rebels was working, they didn't need to launch an chemical attack that would also hurt civilians and the hostages.
You know who have used chemical weapons? ISIS, least 52 times.
So who did the attack? These people did the attack.
https://twitter.com/Partisangirl/status/983669506936418304
I'm not a chemical warfare expert, but that isn't normal, that entire area would be sealed off by now and hazmat suit galore, because who knows what gas or chemicals could had been used.
Point is am not going to trust some dodgy video from the White Hats that are best buddies with head chopping religious fanatics and proceed to bomb a country to bits on their word.
Independent investigation by different groups and bodies before any sort of action.