By Dan Bobkoff
http://stream.publicbroadcasting.net/production/mp3/wamc/local-wamc-520399.mp3
Boston, MA – Boston's Interstate-90 connector tunnel remains closed as the investigation and finger-pointing continues. On Monday, 12 tons of concrete fell from the ceiling of the Big Dig tunnel, crushing to death a woman in a car. Late details now from WAMC's Pioneer Valley Bureau Chief Dan Bobkoff.