After major advances, barriers remain for disabled Americans

Twenty-five years ago, the Americans with Disabilities Act was signed into law, prohibiting employment discrimination and guaranteeing access to public places and transportation. For a look at the progress and the challenges, Judy Woodruff talks to U.S. Special Advisor for International Disability Rights Judith Heumann, Tatyana McFadden, a Paralympic wheelchair racer, and Rep. Jim Langevin, D-R.I.