Luckily for you The Tuskegee Institute is now visitor-friendly (PD-USGOV)
Alabama - The Tuskegee Incident
Written by Justine Sterling. In 1932, the government left 600 impoverished black men infected with syphilis untreated in order to study the effects of the disease as it progressed. The men never knew they had syphilis. Many of the men infected their wives and children (and some died) before a whistleblower alerted the media... forty years later.