Popular Science -
15 Feb 2013 17:00

Engineering advances have architects striving for the mile-high skyscraper. On the morning of September 11, 2001, Bill Baker, a structural engineer with the architecture firm Skidmore, Owings and Merrill (SOM), was at his office in downtown Chicago. SOM is the undisputed leader in skyscraper design, and, at least on the engineering side, Baker is its undisputed king. In the past 30 years, he has overseen or worked on six of the world's 15 tallest buildings. But 9/11 was a bad day to be king: As ...
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