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Chaim Weizmann was a Zionist leader and an Israeli statesman who served as the first president of Israel. He was elected in February 1949 and served until his death in 1952. During his presidency, Weizmann convinced to United States to officially recognize Israel as a newly formed state. Before his political career began, Weizmann was a biochemist who developed the acetone-butanol-ethanol fermentation process, which was used by British industries during World War I.