How is America to be defined? By its failures or its triumphs? Today, there seems to be an obsession with the former and a dismissal of the latter. Is this dark vision of the freest and most prosperous nation on earth an accurate narrative or a cynical distortion? James Robbins, columnist for USA Today and author of "Erasing America," considers that question in this video. How we view America's past will very much shape America's future.