this whole thing of a “wall” is just foolish. A wall is probably ineffective.
What is needed is a barrier like the Saudi’s erected on the border with Yemen and Syria and like the Indians have erected on the border with Pakistan. These things are all but impervious.
Old article but this thing is finished by now.
I don't care how the molecules arranged, as long as it works.
Whatever choices of wall, fence, aerial monitoring, motion sensors etc are installed, as most fitting and effective for every location along the border, I think the public will accept as a "wall."