It is too early to say what caused the tragic collapse, but as this reinforced and prestressed concrete bridge has been there for 50 years it is possible that corrosion of tendons or reinforcement may be a contributory factor. Ian Firth More Quotes by Ian Firth More Quotes From Ian Firth It's not my job to [ know ] that, my job is to think about the future and work for the future of the city. Ian Firth world