THIS STORY HAS BEEN FORMATTED FOR EASY PRINTING
An FBI investigator pointed to an anchor bolt while investigating the debris in the tunnel yesterday.

Workmanship and design of tunnel are called into question

Problems with bolts, glue found in other tunnel in '98

By Scott Allen and Sean P. Murphy
Globe Staff / July 12, 2006

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Investigators unraveling how concrete ceiling panels cascaded onto a car in one of the Big Dig tunnels should focus on some basic, troubling questions about the way the tunnel ceiling was built, civil engineers and highway construction specialists said yesterday. (Full article: 1278 words)

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