The Tuskegee Experiment ended when:
The researchers realized that what they had done was incredibly cruel and inhumane.
All of the Black men, women, and children who had been infected had passed away.
A whistleblower named Peter Buxtun leaked information about the study to the New York Times, and the paper published it on the front page on November 16, 1972.
Penicillin was made available to all of the test subjects.