A hundred years ago, pit bulls were among the most popular American dog breeds. They were owned by presidents and celebrities; they appeared with The Little Rascals and in countless other movies and ads. America loved the pit bull, and they are still among the most popular dogs. But the pit bull is now seen as a gangster dog, a dog that’s chained up and trained to fight to the death, one you shouldn’t leave alone with children. A new book, Pit Bull: The Battle over an American Icon explores how the pit bull went from adorable to abominable.