Actually, now that I think about it, the Ukrainian was a dioxin poisoning, which is almost as nasty as Polonium poisoning. But yeah, they use poisonings regularly, with dioxin and polonium being favorites perhaps because they don’t give a quick and painless death but a very nasty one.
Okay, if you say so. I just don’t remember it. :0)
Regardless, these micro injector mites are no better and even if partially true have no legitimate purpose in our defense stature, IMO.