More effective than any physical barrier on the southern border. Keeps people out before they can even begin their journey.
You can't fly over it or tunnel underneath it. You can't sneak around it, either. And it's much, much harder to tear down.
But with due process, there is sometimes a way through. Perfectly legal, not unlike carving out a nice little door for yourself.
We know it as security checks. For applicants from Muslim countries, we know it as "Muslim Processing Time."
buzzfeednews.com/article/talala…
We sued, and today, before the court even had a chance to rule, the visa was granted.
It's a great thing.