The wild horse is so ingrained in the American imagination that even those who have never seen one know what it stands for: fierce independence, unbridled freedom, the bedrock ideals of the nation. From car ads to high school mascots, the wild horse--popularly known as the mustang--is the enduring icon of America. But in modern times it has become entangled in controversy and bureaucracy, and now its future is in question. In Wild Horse Country,...