It was probably around 1967 and I was in grade school when we got this neato paperback book in the mail. It was for civil defense - all about what to do in case of nuclear attacks or national disasters. I read it and reread it, and was probably the only kid who carried it back and forth to school every day. (Yeah, I was weird).
Now Grognard leads us to this Weapons of Mass Destruction Handbook.
Later he gets it wrong here, but his commenters set him right.