Photos from NTSB's report on Big Dig tunnel collapse
The Boston Globe
This image shows a four-anchor roof hanger plate that had also pulled away from the tunnel roof in the westbound Interstate 90 connector tunnel.
This image shows a four-anchor roof hanger plate that had also pulled away from the tunnel roof in the westbound Interstate 90 connector tunnel.
(Photo provided by NTSB)
 STORY: Wide risk, wide blame
 Documents offer peek into probe
Pop-up GRAPHIC: The NTSB conclusions
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