So he doesn’t actually have proof of it.
No one has proof of anything, except the word of the terrorists, I mean Freedom Fighters, saying it was a chemical attack. One that you wouldn’t be able to run thru.
They say he used Chlorine Gas, right? Do yourself a favor to test the theory that you’d be able to run after inhaling that. Find someone that has a pool and uses a chlorinator, with the big tablets. Open the chlorinator and the pale that holds the tablets and take a big huge whiff into your lungs. You’ll be on the ground choking as the chlorine starts getting into your lungs.