I remember POTUS saying in a campaign speech that the wall will be concrete, and be (I think he said) 30 ft above ground and 30 ft below ground, or something along those lines. How deep is the average tunnel, I wonder.
I remember POTUS saying in a campaign speech that the wall will be concrete, and be (I think he said) 30 ft above ground and 30 ft below ground, or something along those lines. How deep is the average tunnel, I wonder.