Just ask the Israelis how they stop tunnels, easily done. The...

  1. 3,464 Posts.
    Just ask the Israelis how they stop tunnels, easily done. The point is you make it difficult for them to get in. There are a plethora of anti tunneling measures that can be used. Only the hardest crims will try to gain entry and you have effectively concentrated the worst in one or two spots that can then be easily neutralised.
 
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