Bartoszewski was a founder of the Polish resistance who organized an underground organization, comprised mostly of Catholics, to help save Jews. He worked to provide false documents to Jews living outside the Warsaw ghetto. In the fall of 1942, he helped found an organization (Council for Aid to Jews) which successfully saved many Jews from the gas chambers. Bartoszweski was actually imprisoned in the Auschwitz Concentration Camp between 1940 and 1941, and after his release was secured by the Red Cross he reported on the camp.
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Before the war, Mengele had received doctorates in anthropology and medicine, and began a career as a researcher. He joined the Nazi Party in 1937 and the SS in 1938. He was assigned as a battalion medical officer at the start of World War II, then transferred to the Nazi concentration camps service in early 1943 and assigned to Auschwitz, where he saw the opportunity to conduct genetic research on human subjects. His subsequent experiments focused primarily on twins, with little regard for the health or safety of the victims.[2][3]
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