Wilbert Smith Archives Files Box 1131 03 1131-03-p019

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but, either way, there is public information available concerning a weapon of this type. The Lawrence Livermore National Laboratory is, in fact, currently working on the development of a new type of nuclear weapon that is able to bore into the ground “tens of feet" before bursting. The Laboratory refuses to be more precise about the weapon's penetration capability. When the buried weapon explodes it produces shock waves “dozens of times more powerful than its air- burst or ground-burst...