we all know that won't happen until the politicians quit pandering to the mexican lobbyists a la "La Raza".
You are correct and the solution is sooooooo obvious. However, I don't expect it to be done until the next successful and more deadly attack. Then, too little, too late, your suggestion will be implemented and still, the cowboy types will be wailing that they want their right to travel anywhere, anytime and anonymously in America.
We will pay big time unless we implement security.