building a weapon that goes boom from hitting critical mass of uranium/other radioactive element is pretty straight forward. Getting enough uranium is one of th

building a weapon that goes boom from hitting critical mass of uranium/other radioactive element is pretty straight forward. Getting enough uranium is one of the hard parts, but it's not the only hard part. getting a nuke somewhere without being stopped is pretty difficult too. sure you can put it in the back of a pickup and blow it up somewhere, but hiding the radiation of that bomb while you travel/assemble isn't easy. Building a rocket is difficult for nations.