If you ask me you can't trust any of them when it comes to the truth. I am more inline with this article and the witnesses just saying they heard an explosion and were hustled into a building and sprayed down. Since the beginning I surmised that the real truth more than likely was the opposition forces didn't want the US pulling out like they stated the prior week and they set this up. If there was any "proof" of the chemical it was more than likely handed over as evidence by them also....where they got it from who knows but out of all the other theories that one seems most plausible. Like I said though you can't take what any of them say with a grain of salt when it comes to getting at the truth.