> a multi-billion dollar industrial infrastructure away from being able to build one. This is true! And the biggest reason why despite AQ Kahn selling a "make

> a multi-billion dollar industrial infrastructure away from being able to build one. This is true! And the biggest reason why despite AQ Kahn selling a "make your own fat man" kit only a few countries were successful with it. However, additive manufacturing poses a big nuclear proliferation risk. Being able to manufacture accurate parts for cheap, without advanced export controlled equipment, poses serious issues.