Since I've discussed this with him a few times, I'll paraphrase what he's likely to say:
"This 'leaky Sarin shell' that was found in the desert was a shell from a program that no one knew Saddam had. It was a binary shell that mixed the components in the air, and thus, it would be just as dangerous as it was ten years ago if it was fired properly. The scary part is that since we didn't know he had these in the first place, we don't know if he had more. And it's not likely that he only made (or left) one of them."
But he'll probably have more than that, heh.