December 2, 2016 10:50 am Always Check Those Smoke Detectors A simple check of your smoke detector could be life-saving. US & World Videos 2:07 Campus tensions continue to escalate in Boston 38:12 Prosecution's opening statement in the Karen Read trial | FULL VIDEO 3:30 Opening statements underway in the Karen Read trial 2:08 Tension grows over campus protests in Boston 2:31 Fallen Billerica Police Sgt. Ian Taylor honored at vigil