In the postwar period, blacks pushed in North Carolina and across the South to regain their constitutional rights. College students from North Carolina Agricultural and Technical College (A&amp;T), a historically black college, made Greensboro a center of protests and change. On February 1, 1960, four black college students sat down at an "all-white" Woolworth's lunch counter, and refused to leave after they were denied service. They had already purchased items in other parts of the store and kept their receipts. After being denied lunch service, they brought out the receipts, asking why their money was good everywhere else in the store but not at the lunch counter. Hundreds of supporters soon joined in this sit-in, which lasted several months. Such protests quickly spread across the South, ultimately leading to the desegregation of lunch counters and other facilities at Woolworth's and other chains.