The knowledge of how to make the tool chain of building a nuclear weapon is something that every undergraduate in physics can work out from first principles. T

The knowledge of how to make the tool chain of building a nuclear weapon is something that every undergraduate in physics can work out from first principles. This has been the case since 1960: https://www.theguardian.com/world/2003/jun/24/usa.science https://www.theguardian.com/world/2003/jun/24/usa.science