The U.S. needed a shot in the arm as the 20th Century went into its last decade and a World's Fair celebrating 500 years of American civilization might turn the trick. The President put the whole job in the lap of the trickiest, most ruthless promoter in the country Claude Regan. And the first thing Regan realized was that Earth wasn't big enough to hold the kind of Fair he wants. . .. so he built a new world!.