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People, Education, Race, USA, pic: September 1956, Middletown, Kentucky, The first day of the autumn term at Eastern High School, with black students working peacefully alongside white students (Photo by Paul Popper/Popperfoto via Getty Images/Getty Images)

People, Education, Race, USA, pic: September 1956, Middletown, Kentucky, The first day of the autumn term at Eastern High School, with black students working peacefully alongside white students  (Photo by Paul Popper/Popperfoto via Getty Images/Getty Images)

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30th October 1954: Mrs Babs Sango with one of her two children. Mrs Sango is married to Johnnie, a West Indian man. Original Publication: Picture Post - 7366 - Marry A Negro? - pub. 1954 (Photo by Charles Hewitt/Picture Post/Hulton Archive/Getty Images)

30th October 1954:  Mrs Babs Sango with one of her two children. Mrs Sango is married to Johnnie, a West Indian man. Original Publication: Picture Post - 7366 - Marry A Negro? - pub. 1954  (Photo by Charles Hewitt/Picture Post/Hulton Archive/Getty Images)

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Education, Segregation, USA, pic: September 1957, Arlington, Virginia, Two young black students leaving Stratford Junior High School after being refused admission by the authorities (Photo by Rolls Press/Popperfoto via Getty Images/Getty Images)

Education, Segregation, USA, pic: September 1957, Arlington, Virginia, Two young black students leaving Stratford Junior High School after being refused admission by the authorities  (Photo by Rolls Press/Popperfoto via Getty Images/Getty Images)

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Mexican-born American actor Anthony Quinn (Antonio Rodolfo Quinn-Oaxaca) giving a cherry to American actress Sherry Moreland (Alvina Mallah). Next to them is American actress Elizabeth Root on the set of City Beneath the Sea. Rome, 1953 (Photo by Franco Fedeli\Reporters Associati & Archivi\Mondadori Portfolio\Mondadori via Getty Images)

Mexican-born American actor Anthony Quinn (Antonio Rodolfo Quinn-Oaxaca) giving a cherry to American actress Sherry Moreland (Alvina Mallah). Next to them is American actress Elizabeth Root on the set of City Beneath the Sea. Rome, 1953 (Photo by Franco Fedeli\Reporters Associati & Archivi\Mondadori Portfolio\Mondadori via Getty Images)