There was a question recently about an EMP, or Electro-Magnetic Pulse device. Now I'm pretty sure the question did not refer to the actual device for creating one, which is a nuclear weapon. Given the other topics which are forbidden, I'm going to go out on a limb and posit that nuclear weapons of the fission variety are off the table -- almost surely. Such devices are not harmless curiosities which is why those threads will get closed.