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BOSTON, Massachusetts (AP) -- The head of the agency overseeing Boston's Big Dig highway project ordered a review of the entire highway system Wednesday after investigators looking into the fatal collapse of concrete ceiling slabs found 60 more questionable areas inside the same tunnel.
Initial inspections revealed dozens of signs of bolts loosening and other potential failures in the eastbound connector tunnel, part of the main route to Boston's Logan Airport, Turnpike Authority officials and the Big Dig project manager said.