Oh didn’t you know, the machines were out dated in 1961 by a different system of tunneling; see the video clip “Post Test” Tunnel, cavity creator
The scientist working on the project found not only did a subsurface 3-kiloton explosion result in a seismic reading but also resulted in the creation
of a huge subsurface cavity 170 feet high by 90 feet wide.
So the next time your china does the rock and roll dance in the cabinet, you might know whom to thank for it.
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