How did researchers at the Johns Hopkins University and the Kennedy Krieger Institute come to be accused of conducting human experiments on African-American toddlers at risk of lead poisoning? The class action lawsuit against Hopkins is the focus of a new book about the relationship between science and industry, research ethics and patient rights. Our guests are Gerald Markowitz, history professor at John Jay College and the City University of New York, and David Rosner, public health and history professor at Columbia.