On Sun, 13 Jan 2019 08:59:18 -0800, pyotr filipivich
wrote:

Gunner Asch on Sun, 13 Jan 2019 04:34:37 -0800
typed in rec.crafts.metalworking the following:
:-)
But I believe that there is a history of tunnels having been dug to
cross the border.

cheers,

John B.

There has indeed. However..one of the additions to the "fence" is
sysmic detection units. They are quite easy to place..its a well
proven technology. Think of it as a form of "land sonar"

The tunnels have been dug in the basements of houses in urban areas to
other urban areas across the border.

Look up about the most successful tunnel under the
Berlin wall.
And note how long it took to dig said tunnel.

The news today has it that "Israel said Sunday it had uncovered all
cross-border attack tunnels dug by Hezbollah from Lebanon and will
bring its operation to find and destroy them to an end after more than
a month."



Cheers,
John B.