The “expert” doctor reporting on the gas incident is a terrorist from UK accused of kidnapping journalists.
That same ‘expert’ doctor apparently received a supply of gas masks two days before this chemical explosion.
You’ve probably seen this already, but check out the links in this:
http://disobedientmedia.com/evidence-calls-western-narrative-about-syrian-chemical-incident-into-question/
This link also contains the infamous tweet from an arabic journalist warning about the ‘chemical strike’ a day before it happened.