In 1932, the United States Public Health Service began a test In Tuskegee, Alabama that would ultimately go down as one of the most infamous clinical studies in United States history. Over the course of 40 years, close to 600 black men were denied treatment for syphilis in order to study the effect of the disease on the body. Learn more about the tragic story behind the Tuskegee Experiment with this clip from season 3 of Genealogy Roadshow.