Boston desegregation busing crisis
The desegregation of Boston public schools (1974–1988) was a period in which the Boston Public Schools were under court control to desegregate through a system of busing students. The call for desegregation and the first years of its implementation led to a series of racial protests and riots that brought national attention, particularly from 1974 to 1976.
Source: Wikipedia — Boston desegregation busing crisis (CC BY-SA 4.0)