The business of diversity is booming. Corporations and cultural institutions spend hundreds of millions of dollars every year on diversity training, yet despite the ubiquity and expense of these efforts, overall racial, gender and ethnic diversity remains an aspiration rather than a reality. Today on Midday: what's been tried, what has succeeded and what's flopped in efforts to achieve more inclusion in American life. Dr. Pamela Newkirk is an award-winning journalist, professor of Journalism at NYU and author of the book "Diversity, Inc.: The Failed Promise of a Billion-Dollar Business."