You do realize that a high school Chemistry course actually contains all the details you need on both bioweapons used in WW2, right? Plus several others you could use. Those books contain the answer to why those 2 people died in the RV in Breaking bad. And they should. They also contain information on Mustard gas and Zyklon-B, including preparation instructions, but of course, you'll have to puzzle it together. That these substances can be used as bioweapons is heavily deemphasized, but you just can't reasonably avoid mentioning and showing them.

Also these books contain maybe not the solution to making thermobaric explosions, but certainly the principle and show you exactly what problem you'd have to solve to make those weapons.

Just about the only thing they stopped teaching is that if you combine that knowledge with which plants contain what ... there's an incredibly easy way to make pudding with cyanide that's safe to touch, for example. That they suppressed.

But at least for Europe, the number of lethal plants just growing along essentially every road or in every forest numbers in the dozens. Including a very famous one they teach every kid about.

Of course, in both cases, the real challenge is making them and deploying them without killing yourself.

We are not safe from bioweapons because nobody knows how to make them. That's not it.