[House Atreides]

I hope that they are planning to include technology that can sense tunneling deep under the border barrier in urban areas and other areas where that is deemed appropriate.

[noiseman]

"I hope that they are planning to include technology that can sense tunneling deep under the border barrier in urban areas and other areas where that is deemed appropriate."

I would mount the wall on pilings driven deep, and then include massive free-floating concrete blocks hidden just below the surface that would prevent shallow tunneling and would crash down and collapse tunnels dug deeper below them.

[PA Engineer]

I hope that they are planning to include technology that can sense tunneling deep under the border barrier in urban areas and other areas where that is deemed appropriate.

I think the tunnels would be a perfect place to dispose of back flow waste from shale operations.