Over its more than 40 year journey from conception to completion, Boston’s Big Dig massive infrastructure project, which rerouted the central highway in the heart of the city, encountered every hurdle imaginable: ruthless politics, engineering challenges, secretive contractors, outright fraud and even the death of one motorist. It became a kind of poster child for big government ‘boondoggles.’ But the full story is of course much more complicated – and really represents a turning point in how America builds infrastructure.