Boston Marathon April 18, 2022 6:08 pm MIT Officer Sean Collier Remembered 9 Years After His Death Sean Collier was shot during the manhunt for the Boston Marathon bombing suspects. US & World Videos 3:11 Electric vehicles in Massachusetts: Are we meeting our goals? 2:24 Primary care doctor shortage leads to long wait times in Mass. 2:06 ‘I didn't think I did anything wrong:' Mass. woman pardoned in Jan. 6 case reacts 2:15 Commuters see delays amid freezing weather 1:54 Tracking blistering cold temperatures on Mount Washington