With all the handwringing over the Ebola guy in Dallas, one must ask: Why is anyone allowed into our country from these disease infested shitholes? It’s a serious question. We treat “open borders” as if it were a law of physics, but it’s not. It’s a policy choice with significant costs. And that choice entails 9/11 attacks, diseases, lower levels of human capital, and other assorted miseries that we must now share with the Third World.