If there’s one writer who’s identified with the Mississippi River, it’s Mark Twain. He grew up in Hannibal, Missouri — on the river’s edge — and as a young man, he worked as a steamboat pilot. And then he wrote the “Adventures of Huckleberry Finn,” the novel that turned the Mississippi into myth. But it also created one of the most enduring controversies in American literary history: how to depict race relations in America's past. In this interview, Andrew Levy says that "Huckleberry Finn" is actually anti-racist — and when it was first published, the big controversy was about Twain’s depiction of wild children.