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September 12, 1910 - Alice Stebbins Wells, a former social worker, becomes the first woman police officer with arrest powers in the U.S. (Los Angeles, CA)
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September 14, 1964 - Helen Keller receives the Presidential Medal of Freedom along with 4 other women: Dr. Lena Edwards, Lynn Fontainne, Dr. Helen Taussig, and Leontyne Price
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September 14, 1975 - Elizabeth Ann Seton is canonized and becomes the first American-born saint, founded the first U.S. Order of the Sisters of Charity of St. Joseph
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September 20, 1973 - Billie Jean King defeats Bobby "No-Broad-Can-Beat-Me" Riggs in the battle of the sexes tennis match
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September 25, 1981 - Sandra Day O'Connor is sworn in as the first woman U.S. Supreme Court Justice
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September 26, 1971 - Rep. Shirley Chisholm (D-New York) announces she will enter the Democratic presidential primaries
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September 26, 1973 - Capt. Lorraine Potter, an American Baptist minister, becomes the first woman U.S. Air Force chaplain
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September 29, 1988 - Stacy Allison becomes first American woman to reach the summit of Mt. Everest