High on a granite cliff in South Dakota's Black Hills tower the huge carved faces of four American presidents: George Washington, Thomas Jefferson, Abraham Lincoln, and Theodore Roosevelt. Together they constitute the world's largest piece of sculpture.The story of Mount Rushmore's creation is as bizarre and wonderful as the monument itself. It is the tale of a hyperactive, temperamental artist whose talent and determination propelled the project, even as his ego and obsession threatened to tear it apart. It is the story of hucksterism and hyperbole, of a massive public works project in the midst of an economic depression. And it is the story of dozens of ordinary Americans who suddenly found themselves suspended high on a cliff face with drills and hammers as a Danish sculptor they considered insane directed them in the creation what some would call a monstrosity, and others a masterpiece.