U.S. secretly tested carcinogen on Canadian cities during the Cold War, researcher finds

The U.S. Army secretly dumped a carcinogen on unknowing Canadians in Winnipeg and Alberta during the Cold War in testing linked to weaponry involving radioactive components meant to attack the Soviet Union, according to classified documents revealed in a new book.

Between July 9, 1953 and Aug 1, 1953, six kilograms of zinc cadmium sulfide was sprayed onto unsuspecting citizens of Winnipeg from U.S. Army planes. The Army returned 11 years later and repeated the experiments in Suffield, Alta. and Medicine Hat, Alta., according to Lisa Martino-Taylor.

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