Why the U.S. military exposed minority soldiers to toxic gas
Clip: 06/22/2015 | 7m 44s
During World War II, the U.S. government conducted experiments with mustard gas and other chemicals on thousands of American troops. A new NPR investigation has found that some military experiments singled out African-American, Japanese-American and Puerto Rican servicemen by race. Judy Woodruff learns more from Caitlin Dickerson of NPR and Susan Smith of University of Alberta.
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