<human>:  What was the name of the first major sit-in at a lunch counter in the United States?
<bot>: The first sit-in at a lunch counter in the United States was the Greensboro sit-in. The sit-in took place at a Woolworth's lunch counter in Greensboro, North Carolina, on February 1, 1960. It was organized by four African American students at North Carolina A&T State University who wanted to integrate the lunch counter.