CNN Anderson Cooper 360 May 25, 2013 00:17:00
See, it's just as relevant today as it was back then. some of them, like san francisco's golden gate, are national symbols. but a startling number of america's bridges have become a symbol for something else. neglect and now, danger. bridges are essential to our daily lives, but more than 150,000 of them, about a quarter of all the bridges in this country, have been rated as structurally deficient or functionally obsolete. in plain english, they're getting old. >> like anything else, there is a useful life for all structures and ultimately they need to be replaced or strengthened. >> reporter:...