Massachusetts July 21, 2017 11:35 am Tractor-Trailer Rolls Over in Waltham, Massachusetts A tractor-trailer rolled over in Waltham, Massachusetts, in the area of 950 Winter Office Park. No word on any injuries. US & World Videos 20:50 Karen Read trial: How accounts of first responders have differed 2:43 ‘On the Dot' to redevelop stretch of Dorchester Avenue 1:49 Finalists in math competition hope their model helps ease housing crisis 14:31 @Issue extra: Seth Moulton on pro-Palestinian protests, TikTok and more 2:31 Celtics preparing for pivotal Game 3 against Heat in Miami