A short report by Alex Thomson, UK C4 reporter, from the Syrian government side of the frontlines:http://blogs.channel4.com/alex-thoms...th-debris/4444

All in all weapons experts would consider chlorine as a not particularly effective chemical weapon in terms of effect, but one ideally suited to home-made weaponising because of factors like its stability and availability.

In short the kind of device that conventional armies would not be interested in, but a militia group might just be.