Massachusetts December 9, 2021 5:40 pm U.S. Surgeon General Warns of Youth Mental Health Crisis The surgeon general says the pandemic has had a devastating impact on young people, issuing a warning about the emerging crisis. US & World Videos 4:17 Police presence grows at pro-Palestinian encampment at Northeastern 5:39 Billerica police sergeant hit and killed by excavator during construction detail 2:31 Celtics preparing for pivotal Game 3 against Heat in Miami 2:37 Quincy detective resigns amid allegations of ‘unwelcome, sexually explicit conduct' 4:07 Officer hit and killed while working construction detail in Billerica, authorities say