It is illegal to detonate any nuclear weapon. You can have them, but you just can’t detonate them.

13.25.050 Possession of airguns and similar devices. (a) No person shall have in his or her physical possession, nor shall discharge, an airgun, bow and arrow, or slingshot within the city. (b) The prohibitions of subsection (a) of this section do not apply to possession or discharging in authorized locations, or to transporting along a…