soma, donald mcdonald takes us behind the curtain of his architectural lab. at the moment he's sketching the next stress ribbon bridge. you're probably familiar with some of his earlier work. like the easternghlight of my life basically. >> reporter: and clearly mcdonald is a patient man. >> supposed to get down in four or five years or something but, as you know, the politics got involved with jerry brown, our mayor, willie brown, and we had all kind of concessions they wanted in mitigation. >> reporter: not to mention governor sha wachwarzenegger scrapping design plans at one point. there were five cities involved and a price tag that ballooned to five times the original zime estimate. but the bridge got done. consider the troubles faced by the golden gate bridge which was close to never seeing the light of day. rod deeradon names a few obstacles like lawsuit and money. >> the golden gate bridge in 1930 had 2,300 lawsuits against it. 2 stsht 2,300 lawsuits against it. >> compared to fewer than a dozen for high speed rail. then there's the cost. >> the price tag had gone up dramatically. couple hundred million dollars. goodness, a couple hundred million dollars. 1935, that was a few bucks