This is a complete set up - Obama wants this fight bad! Assad is trying to avoid a war with the US, not start one.
At the G20 today, Obama was asked what he would do if they were gassed again. He said, he would act on it.
Well - it appears he got his way!
http://www.bbc.co.uk/news/uk-18897218
If an ambassador catches on he may become victim of a "rebel uprising". If it gets difficult, create a WMD false flag and send Aircraft carriers to do a Drive-By