August 3, 2016 6:00 pm Boston's Restaurants to Get Letter Grades Boston Mayor Marty Walsh has introduced a new food grading system that may soon affect every restaurant in the city of Boston. US & World Videos 2:10 Authorities continue fixing water main break in Boston 2:50 Water main break floods Boylston Street in Back Bay 1:50 Man killed in Plainville house fire 2:23 Family demands justice 3 months after trooper's death 2:21 Holiday decorating on a budget