How many of them NK buggers are there?
300 plus nodong and scud which can be short/intermediate in range (across the Sea of Japan), and many of them are targeted at US military bases in Japan as we speak. in fact each and every US military base and Japanese self defense force base probably has at least a few North Koran scuds trained on it. These can carry chems and bios, or maybe even some crude radioactive material if they really want to be nasty.