Four black students stage the first of the Greensboro sit-ins at a lunch counter in Greensboro, North Carolina.

The Greensboro sit-ins were a series of nonviolent protests in February to July 1960, primarily in the Woolworth store—now the International Civil Rights Center and Museum—in Greensboro, North Carolina, which led to the F. W. Woolworth Company department store chain removing its policy of racial…