Larry, very interesting points and you clearly picked up on the people without serious protection against Sarin Gas! The footage on TV tended to also show a disproportionate amount of children and it seemed the usual terrorists strategy of hiding behind human shields was in play, or their well known habit of hiding munitions under schools and hospitals! Thinking deeper regarding the overall scenario, it also occurred to me that the "Ammo store" possibility, may well have related to the old Saddam Hussein WOMD saga 15 years ago. We Knew he had used them on the northern Iraqi Kurds and the consensus then, lent towards the WOMD  being disappeared into Syria during the stalling UN discussions and Desert Storm era!
The current possibility of aircraft fire hitting a terrorist ammo dump, hidden under a school, seems to have eluted any news reports. Maybe there's not much political mileage for any actors in that avenue of investigation.
Time may tell a new story soon!

Alan Jackson.
Poulsbo.