[–]NACHTJAGD0 points
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As i said, the copper wire will help in finding the tunnel by ground penetrating radar to locate and make sure no new tunnel is created. It can also be used to bounce radio signals off to detect changes in the structure of the wire, which would indicate they re-dug some of the tunnel.
[–] NACHTJAGD ago
As i said, the copper wire will help in finding the tunnel by ground penetrating radar to locate and make sure no new tunnel is created. It can also be used to bounce radio signals off to detect changes in the structure of the wire, which would indicate they re-dug some of the tunnel.