Quote Originally Posted by Papewaio View Post
Chlorine probably has such a small size that it can penetrate any normal air filter. It would require a sealed air supply. Even then chlorine oxidizes (rusts) a lot of materials.
You can do it with an extra filter. But I suspect the gas mask starts to be too clumpsy at that point.

Anyway back to my question. The theory was that it's the rebels who used gas and why the US is then jumping on Assad instead of the rebels. I do get feeling that this is a big mess and the US is trying to get something half decent out of it long term.

Using chemical weapons is a big no no (the NBC list is there for a reason), so that it's forcing a severe response is not surprising.