MBTA September 16, 2019 7:15 am Meeting Could Reveal Cause of Red Line Derailment After more than three months, we could finally learn what caused an MBTA Red Line train to derail in June. US & World Videos 2:50 Community mourns Billerica police sergeant killed on duty 3:02 Northeastern protesters released from police custody 4:32 Anti-war protester at Northeastern speaks amid arrests: ‘We are peaceful students' 10:42 Multiple people arrested as police clear campus encampments 1:40 Heavy police presence near on-campus protests