Historian Daniel Immerwahr talks about the legacy of Cornelius Rhoads, a doctor and cancer researcher who enthusiastically claimed he killed eight of his patients during his time in San Juan, Puerto Rico, where he studied anemia in the 1930s. “What’s extraordinary to me is just how long he got away with it,” says Immerwahr. “How many Puerto Ricans he was able to experiment on, in some of the worst ways imaginable, without facing the consequences of that.” | Democracy Now!