A trainIn the movie version of Atlas Shrugged, there is a scene in which Ayn Rand's libertarian heroes defy all odds, deploy some untold amount of private funding, and launch the fastest high-speed train in history over rails of experimental metal. "The run of the John Galt Line is thrilling," wrote the libertarian federal judge Alex Kozinski. "When it crossed the bridge made of Rearden Metal, I wanted to stand up and cheer."That's in the fantasy world. In the real world, libertarians aren't...