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 2:56 New planet discoveries lead to new questions for MIT astronomers 3:25 Principal dancer bids farewell to Boston Ballet 12:05 Heart monitors of the future could be peel-and-stick like temporary tattoos 0:30 Speak now: Sebastián Agudelo 4:25 Speak now: Sue O'Connell