It was the Citicorp building in New York City. In 1978, a year after it was built, Diane Hartley (a student at the time) discovered that aerodynamic calculation

It was the Citicorp building in New York City. In 1978, a year after it was built, Diane Hartley (a student at the time) discovered that aerodynamic calculations of wind loads on the skyscraper had been vastly underestimated. She contacted William LeMessurier, the structural engineer, and he re-did the analysis considering quartering winds. When it became clear the building would structurally fail in the next big storm, emergency repairs were done, welders working in secret at night, on almost every floor, installing extra cross braces. The building was saved and became an engineering ethics example. Diane Hartley got no credit for her rôle in saving the building until nearly twenty years later.