Already been tried, ie; Berlin. Russkies did all that and more.
Guess what. Didn't work.
Now figure trying that with a 2500 mile border. Just the one. Like the man says, not gonna happen. Deal with it.
We don't even have an adequate FENCE along the border, let alone enough border patrols to stop illegal immigrants from coming into the nation. You're telling me nothing can be done about that?
We literally have millions of illegals walking into the country -- any one of which could be terrorist -- unimpeded!
The minutemen are doing more to stop illegals than our government is.
To say nothing more can be done is mindnumbingly dumb.