Another reprehensible chapter in the dark history of medical experimentation on people of color by the U.S. government was recently brought to light. Between 1946 and 1948, American scientists intentionally infected prisoners and patients in a Guatemalan mental hospital with syphilis and gonorrhea. The recently unearthed National Institutes of Health (NIH) experiment, which was conducted over 60 years ago, prompted President Barack Obama and Secretary of State, Hilary Rodham Clinton, to call the president of Guatemala, Alvaro Colomto, to officially apologize . "We are outraged that such reprehensible research could have occurred under the guise of public health," said Clinton and Health and Human Services Secretary Kathleen Sebelius. The NIH-funded experiment to test what was at the time a relatively new drug, penicillin, was discovered by a Wellesley College medical historian. The purpose of the study was to see if penicillin could prevent some sexually transmitted diseases.