What department is responsible for the security of nuclear weapons?
https://www.researchgate.net/publication/6327144_Neutron_detection_on_the_Foton-M2_satellite_by_a_track_etch_detector_stack
If you wanted to refine uranium and/or operate breeder reactors, where would you do it?
Where did the material for North Korea's nuclear weapons come from?
Where did the Uranium from U1 go?