An aside from the topic? I don't want to hijack the thread and have one thought about the whole situation?

One thing that puzzles the eff out of me is the question "Are chemical weapons being used?"

When you see people dead in the streets that have no visible wounds or injuries what else would the die from?

I know there is a question of how and of what they died from, but what other weapon/system kills with out any obvious physical signs?