This is ridiculous to believe that Assad used chemical weapons. The deal had already been brokered by Russia for Jaysh al Islam (subsidiary terror group of Jabhat al Nusra AQ) to leave Douma.
Assad's forces had already won the city back from the terrorists to free their citizens. Assad and his Generals are not whack jobs. Why on earth would they risk universal condemnation considering they had WON.
This is just another freaking false flag. If the US bombs Syria killing more Syrian civilians ( which is seriously demented ) to punish Assad, it's just a pretext. There's no way in hell anyone in the DoD could believe this shit.
Oh and by the way this terror group in particular is sponsored by Saudi Arabia and they have been shelling Damascus for years while holding Douma and its citizens hostage.
"A Russian-sponsored deal requires that the Jaish al-Islam rebel group surrender all prisoners before leaving."
Syrian rebels leave Douma amid outrage over chemical attacks