Not surprisingly, immigration warriors are using the swine flu outbreak to buttress their case for closing the borders to the outside world. In the process, they miss a big problem, however, one that I have raised for many years. If we’re going to have the government close the borders to people coming into the country to protect us from infectious diseases, then we’re going to have to also close the borders in the other direction, which means prohibiting Americans from traveling to other countries, where they can catch diseases and bring them back. And that necessarily will mean a lot of control and tyranny, as citizen of North Korea will attest.