Chinese workers have been a part of California history since the Gold Rush. Early Chinese laborers built the railroads and today, immigrants from China are part of the state's high-tech manufacturing. But just as in the early days, the immigrant worker's life is often difficult -- with low pay, and sometimes dangerous working conditions. In the Bay Area, hundreds of Chinese immigrant factory workers were exposed to high levels of arsenic. Reporter Jason Margolis tells us that several years later, they're still fighting for justice. Reporter: Jason Margolis