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AugustaJulia ago

This is a tangential comment. Now the military has the equipment to "look" through the earth and discover tunnels that are very deep. For some reason the figure of 20 meters comes to mind, although I might be wrong. We also have infrared equipment that allows us to see through walls and roofs.

It's interesting to know, in any case. People used to build tunnels or escape to thick forests in order to hide. Now we are living in the "you can run but you can't hide" times. I used to think that this is totally creepy, but perhaps in this case it will allow us to smoke the bad guys out.