I understand that this is probably a sarcasm but I couldn't resist to comment.

It is not difficult to know how to build a nuclear bomb in principle. Most of nuclear physicists in their early career would know the theory behind and what is needed to do that. The problem would be acquiring the fission materials. And producing them yourself would need state sponsored infrastructure (and then the whole world would know for sure). It would take hundred of engineers/scientists and a lot of effort to build nuclear reactor and chemical factories and the supporting infrastructure. Then the design of bomb delivery.

So an AI telling you that is no different from having a couple of lunches with a nuclear physicist telling you this information. Then you will say wow that's interesting and then move on with your life.