this shows a higher level of technical expertise. and the atom bomb, oddly enough, even though it s physically a big device normally, it presents a smaller blast in nuclear terms than the hydrogen bomb which can be made smaller and produce a bigger blast. so kate, this is the kind of thing that would be easier fitted onto a rocket that north korea has right now and launched at somebody else. hence why it is so dangerous and such a concern in the united states and beyond. so how big would the blast you say it s bigger. how big would the blast be from a hydrogen bomb? if we went back to the 1940s and looked at the two bombs dropped on japan at the end of world war ii, this would be the rough blast size of those bombs. look at the advancement since then. here s another nuclear blast. another atomic blast. but these, the last three here, these are hydrogen test blasters. look at the comparable size. it is absolutely massive out