October 29, 2015 9:10 am Replacing Aging Smoke and CO Alarms A working smoke alarm is your first line of defense in a fire, but it’s up to you to make sure if it needs to be replaced. US & World Videos 0:59 Jury seated in Karen Read murder trial, hearing for outstanding motions Thursday 1:33 Ice Cube talks basketball: The Big 3 league, how far the Celtics can go, and more 2:31 Mike Gorman retires as voice of the Celtics 1:27 Ex-Holyoke city councilor facing child sex abuse charges appears to join Russian military 1:21 Dana-Farber Cancer Institute retracts 7 studies