Greensboro Four were a group of four African American college students who sat down in protest at a whites-only lunch counter in Greensboro, North Carolina, in 1960. At that time, many facilities in the United States, especially in the South, were racially segregated, and blacks were prohibited from using them. The Greensboro protest, called a sit-in, sparked a wave of similar demonstrations throughout the South.
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Garrow, David J. "Greensboro Four." World Book Student. World Book, 2014. Web. 27 Oct. 2014.