Classes were canceled for more than half a million Los Angeles students after education support staff launched a three-day strike backed by a teachers' union that refused to cross their picket line. Members of the Service Employees International Union Local 99, which represents school bus drivers, custodians, cafeteria workers and classroom assistants, formed picket lines and marched outside of school buildings across the Los Angeles Unified School District, demanding higher wages and smaller classroom sizes. #Reuters #news #live #LosAngeles #California #LAUSD #teachers #strike #education