 Well, the Van Allen belt is less of a problem because you're going to go through the Van Allen belt very quickly. And the astronauts on Apollo did that, and it did not have any long-term effects of any significance. So the Van Allen belt's less of a problem. It's really when you get out beyond them that you're exposed to cosmic rays and to other radiation that's much more lethal, especially from the sun, especially from the sun. And so...