About the engineering concepts behind a new wall? The technology that will be applied. The competitions that have already been had, the modelling that it took?
Cause if you aren't aware of why a wall will work then why are you acting like you know better than the US Army Corps of Engineers and the Department of Homeland Security.
This is such a hilarious discussion because there are bunch of idiots running around spouting off about why it wont work when there is already engineering designs, proof of concept physical models, and detailed engineering estimates prepared.
But you keep spouting off acting like you know everything. It suits you real well.