WHAT WOULD Tip think? House Speaker Thomas P. ``Tip" O'Neill Jr. goes down in political history as the Big Dig's big booster. The legendary Democrat from North Cambridge stoked it with federal dollars, spurred by his belief that it was a transportation necessity and an economic boost. Today, Thomas P. O'Neill III, the late speaker's son, represents Bechtel Corp. -- the company that helped supervise the project from dream to reality to fiasco. This summer, tons of concrete crashed down from a connector tunnel ceiling, killing a woman. Since then, everything about Boston's Big Dig, from design and construction to...
