The Chinese built a wall over varying terrain a, before Christ, with rocks. I’m pretty confident a wall on the Southern border will be ok.
As nice as it would be to have, with the addition of a wide and deep moat, filled with alligators and piranhas, we wouldn’t need it if we got rid of Birthright Citizenship, the refugee programs and took all the bennies away that go with both.
“The Chinese built a wall over varying terrain a, before Christ”
And they havent had any problems with mexican illegal aliens since then. ;-)