July 24, 2017 5:20 am Crews Remain on Scene of Massive Waltham Blaze Fire investigators are trying to figure out what sparked a massive fire in Waltham, Massachusetts, that raced through an apartment complex under construction. US & World Videos 1:43 Authorities respond to incident in Northbridge 0:49 Bowling alley reopens 6 months after mass shootings in Lewiston, Maine 2:27 Mother speaks out after school shooting threat in Milton 0:17 Student encampments taken down at Tufts University 1:46 Deaf woman stabbed in East Boston