July 1, 2022 2:44 pm Meet Mass. State Police's Robot Version of a Bomb-Sniffing Dog Roscoe, a Massachusetts State Police robotic dog, is part of the team keeping the Boston Pops Fourth of July Spectacular safe this year. US & World Videos 2:38 Salem prepares for a busy Halloween season 2:30 Diddy denied bail in sex trafficking case 1:55 Water main break floods streets in Dorchester 3:59 Does the Secret Service need an overhaul? 2:47 Dorchester opera asks, ‘Is This America?'