North America's largest mammal, the American bison, is an enduring symbol of the Great Plains. Over a century ago, the species survived near extinction and is today considered a conservation success story. | Nebraska Public Media

Before being hunted to the brink of extinction, more than 60 million bison used to roam North America, making them an icon of the American West. We take a look at the enormous efforts to reintroduce the animal to Native American territory. | CBS Evening News