A pull-quote, for when the article expires from boston.com:
Doubt aired on safety of I-93 tunnels
Engineer cites leaks, damage, lack of data
By Sean P. Murphy and Raphael Lewis, Globe Staff | March 15, 2005
The engineering specialist who led the investigation into leaks in the Big Dig says he can no longer say with confidence that the Interstate 93 tunnels are safe to drive in, according to a letter obtained by the Globe.