Even though lead is now illegal in house paint and gasoline, thousands of people in the U.S. come in close contact with dangerous lead fumes and dust on the job, sometimes without even knowing it. State and Federal rules are supposed to protect workers from toxic materials, but some employers continue to provide their workers little or no protections against lead poisoning. In the final part of the re- broadcast of our series, Deirdre Kennedy takes us where the “Silent Epidemic” of lead poisoning can be found in the workplace.