In this Oct. 10, 1974 file photo, motorcycle police escort buses to a school in Boston. The nonprofit Union of Minority Neighborhoods is hosting a group of exercises across Boston in 20

 

              In this Oct. 10, 1974 file photo, motorcycle police escort buses to a school in Boston. The nonprofit Union of Minority Neighborhoods is hosting a group of exercises across Boston in 20
In this Oct. 10, 1974 file photo, motorcycle police escort buses to a school in Boston. The nonprofit Union of Minority Neighborhoods is hosting a group of exercises across Boston in 2013, where participants talk about how the city’s busing crisis impacted them in the 1970s. Organizers hope it will unite people to fight for better access to quality public schools for all students, even as another new Boston school assignment system starts. (AP Photo/Frank Curtin, File)