HOW THEY HAVE BUILD DUMBS? BORING MACHINES, LASERS & NUKES - up to 7 MILES PER DAY
D-eep U-nderground M-ilitary B-ase ---->> D.U.M.B - TBM - US Patent 3693731A - issued September 26, 1972 for laser tunneling , US Patent 3885332A - issued May 27 , 1975 for nuclear powered laser tunne
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