This article is pretty terrible. It's a pretty well known incident at this point, and there have been several articles about it and IIRC it was even covered in

This article is pretty terrible. It's a pretty well known incident at this point, and there have been several articles about it and IIRC it was even covered in a PBS or History Channel TV show about skyscrapers. The Wikipedia article about the building gives better and more accurate information than the Slate article. https://en.wikipedia.org/wiki/Citigroup_Center https://en.wikipedia.org/wiki/Citigroup_Center