More than 20 years ago, a real-life David and Goliath story began unfolding in the small town of Hinkley, California. Hollywood eventually made a movie about its heroine, Erin Brokovich. She uncovered groundwater pollution that had exposed the residents to dangerous toxins. The film propelled her to national fame, and now she works with communities all over the country. She tells us about some of the places she has helped, and what has changed in Hinkley since the movie.