http://www.truthseekeratroswell.com/d.u.m.b.html
patent= 3,693,731
tunnel boring machine that's nuclear powered by a mini nuclear reactor wow!
i feel they use free energy devices for most of these now or at the very least thorium which is 1/1000 as radioactive as nuclear power not competly clean sure but a massive improvment though lol!
But sure better to go with tesla or free energy devices like using large quarts crystals piezoelectricy as a power source which is im sure in newer verisons of tunnel boring machines and spacecrafts!
https://www.bibliotecapleyades.net/sociopolitica/esp_sociopol_underground01g.htm
