Myths obscure the truth about Las Vegas. In this episode of America: Facts vs. Fiction, learn that gambling wasn't the first enterprise to pour billions into Nevada's economy and that Hoover Dam's concrete hasn't finished hardening.

The truth about great feats of engineering can be clouded by myth. Discover that the Panama Canal doesn't run east and west, but north and south. And that the Transcontinental Railroad wasn't completed at Utah's Promontory Point.