Most of you, I presume, are familiar with the Yellowstone Caldera, through the numerous documentaries and TV movies about the subject. For those who are not aware of this geological phenomenon, under Yellowstone National Park lies a massive pool of magma, which when released may well cause an eruption that will dwarf Mount St. Helens, or even Tambora or Krakatoa themselves. Despite scaremongering, of course, there is no prospect of such a thing happening in the next couple hundred thousand years or so, or that if it did it would be the maximum disaster beloved of horror movies.
Nevertheless, the whole thing has given me an idea, which could well be the only path to salvation that the United States clearly has. Here is a map showing the possible extent of the damage resulting from a massive eruption of the Yellowstone Caldera:
Anyway, think about it- it just might be worth it, if it's the only hope we have.