During the summer of 1961, CORE and SNCC organized African American and White volunteers, mostly college students, to ride buses from the North into the South to test Boynton v. Virginia, a 1960 Supreme Court case that called for the desegregation of bus terminals served by interstate bus routes, which was not being enforced. The "Freedom Riders," as they were called, sat together – blacks and whites – on buses and, when they arrived at the segregated bus terminals, tried to desegregate them by sitting in mixed-race groups in the waiting rooms. They often faced angry, violent mobs in the bus stations. Approximately 2/3 of the white Freedom Ride volunteers were Jewish. These rides put enough pressure on the Interstate Commerce Commission that by September 1961 they were working on complying with Boynton vs. Virginia, which ruled that racial segregation on public transportation was illegal.