Leslie Earl Robertson 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.
World Trade Center, Manhattan, New York City
Shanghai World Financial Center, Shanghai
Bank of China Tower, Hong Kong
Puerta de Europa, Madrid
World Trade Center (1973–2001)
The original World Trade Center (WTC) was a large complex of seven buildings in the Financial District of Lower Manhattan in New York City. It opened on April 4, 1973, and was destroyed during the September 11 attacks in 2001. At the time of their completion, the Twin Towers—the original 1 World Trade Center at 1,368 feet (417 m), and 2 World Trade Center at 1,362 feet (415.1 m)—were the tallest buildings in the world. Other buildings in the complex included the Marriott World Trade Center, 4 WTC, 5 WTC, 6 WTC, and 7 WTC. The complex contained 13,400,000 square feet (1,240,000 m2) of office space and, prior to its completion, was projected to accommodate an estimated 130,000 people.
The original complex in March 2001. The tower on the left, with antenna spire, was 1 WTC. The tower on the right was 2 WTC. All seven buildings of the WTC complex are partially visible. The red granite-clad building left of the Twin Towers was the original 7 World Trade Center. In the background is the East River.
Radio Row and Cortlandt Street station (background) in 1936
Lower Manhattan in 1980 with the twin towers visible in the background
The exterior frame of the Twin Towers in 1979
