Reports from the Iraqi authorities in June and July '13 indicate Al Qaeda actually produce chemical weapons, as I've posted earlier in the thread.
From June 2013 is also the news that a Turkish special forces unit arrested Al Qaeda-affiliated Al Nusra members on the Turkish side of the border with Syria, finding them in possession of 2 kg of sarin.
7 June 2013
"Moscow has called on Turkey to provide more information about the reported seizure of the chemical agent sarin from militants detained on the border with Syria, Russian Foreign Minister Sergei Lavrov said on Thursday."
http://zeenews.india.com/news/world/russia-seeks-more-details-from-turkey-on-sarin_853419.html