> Leslie Earl Robertson (February 12, 1928 – February 11, 2021) was an American engineer. He was the lead structural engineer of the Twin Towers of the original [[World Trade Center]] in New York City, and served as structural engineer on numerous other projects, including the U.S. Steel Tower in Pittsburgh, Shanghai World Financial Center, and the Bank of China Tower in Hong Kong. > > [Wikipedia](https://en.wikipedia.org/wiki/Leslie%20E.%20Robertson)