Here is what you need to know about nerve gas in relation to the events in Salisbury. Nerve gases are a terrible and frightening weapon but, if you survive an attack, you will be OK, unlike after a conventional injury which may leave you without a limb or full of shrapnel.
For much of my professional life, I have flirted with nerve gases. A dangerous thing to do you might think but interesting and important as recent events in Salisbury have shown.