Boston January 7, 2021 6:29 pm Biden Taps Walsh for Labor Secretary, Sources Say President-elect Joe Biden has picked Boston Mayor to be head of the Labor Department, sources tell NBC News. US & World Videos 3:05 100 protesters detained at Northeastern University 2:39 Community mourns police sergeant killed on duty 4:32 Anti-war protester at Northeastern speaks amid arrests: ‘We are peaceful students' 5:39 Billerica police sergeant hit and killed by excavator during construction detail 2:30 Arrests made in string of home break-ins targeting Asian-Americans