In 1954, the landmark case Brown v. Board of Education successfully challenged the legitimacy of White supremacy in public schools. In 1955, the Montgomery Improvement Association, led by Martin Luther King Jr., challenged its legitimacy in public transportation. In 1957, the Little Rock Nine challenged the legitimacy of states to obstruct federal integration law. In 1958, the NAACP Youth Council carried out a sit-in protest to challenge the legitimacy of segregated lunch counters in Kansas and Oklahoma. In 1960, student groups carried out sit-in protests in businesses across the United
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