Secret Tunnel Technology. Digging military tunnels has always used secret technology. There are 100s of miles of tunnels under the USA. Today, that military technology has been declassified. The military melted their tunnels using Terahertz radiation and plasma. A Gyrotron drill can melt rocks at 20 meters per hour. Today the secret Gyrotron is being used to drill 20km deep bore holes for Geo Thermal power plants. Prof Simon investigates.

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original music by Anthony Del Duca

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