Thermonuclear weapons require more understanding than normal, don’t you think?
Well, you realize that the duration of nuclear Fallout and designing Fallout shelters was a byproduct of nuclear weapons testing, right? I hate to say it, but the overall testing of such weapons was bittersweet. We gave people radiation poisoning (downwinders in NV, UT, AZ) but at the same time, figuring out how long residual radioactivity lasted for professionals such as Cresson Kearny was a byproduct of the work.