Charlie Baker Insists T Do Its Homework

Gov. Charlie Baker said the MBTA needs to do its “homework” and find out whether the cause of this week’s Red Line derailment could be hiding elsewhere in the T’s heavy rail system, which has been plagued by nearly 30 derailments in three-plus years.T officials say they were still investigating the “root cause” of Wednesday’s mishap, when a six-car Red Line train momentarily jumped the tracks during the morning commute, spraying passengers with shattered glass and spewing smoke as it entered South Boston’s Andrew Station.