MBTA December 4, 2019 5:30 pm MBTA Finds Cause of Issue on New Orange Line Trains The MBTA pulled new Orange Line cars off the track after a problem with their wear pads. US & World Videos 2:31 Billerica police sergeant killed in crash honored at funeral 2:05 MIT monitors pair of opposing protests on campus 2:39 Bruins try not to ‘dwell on the past' ahead of Game 7 against Toronto Maple Leafs 0:45 Lakers fire head coach Darvin Ham 3:41 Cool air to linger over Boston into the weekend