September 20, 2016 8:45 am Water Main Break in Chelsea, Mass. A water main break in Chelsea, Massachusetts, is impacting traffic Tuesday morning. US & World Videos 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 4:17 Police presence grows at pro-Palestinian encampment at Northeastern 5:39 Billerica police sergeant hit and killed by excavator during construction detail