A 'triple-layered' fence according to the article.
Past that, I have no idea.
Ahhhh. Thanks.
Seems to me, that we ought to start deducting say $10,000-25,000 from remittances back to Mexico for every assault on the fence, perhaps for every illegal that gets across.
If we don't sock Mexico where it hurts the ruling elite there, hard to fight it all on the border.
There will be butter cream icing between the layers.