When preparing for construction of architect Jørn Utzon’s design, the Opera House’s original lead engineer could not get his structural calculations for the now-famous roof to work out, and he quit; Zunz took over and used then-new computer modeling techniques to solve the engineering puzzle. And when, during the cost-overrun-plagued construction, Utzon got tired of fighting with politicians and walked away from the project, Zunz saw it through to the end. — The Guardian