The Manhattan Beach Unified School District has joined two other agencies in filing a lawsuit against Gov. Arnold Schwarzenegger aimed at maintaining mental health services for more than 20,000 students statewide, 24 of whom are in the district.On Oct. 8, the governor used his line item veto power to cut $133 million from the 2010-11 state budget in reimbursements to counties that provide state-mandated mental health services to special education students.The cut suspends a mandate in As






