> The material expenditures on the towers were enormous; 192,000 tons of steel, 425,000 cubic yards of concrete, 43,600 windows with 572,000 square feet of glass, 1,143,000 square feet of aluminum sheet, 198 miles of ductwork, and 12,000 miles of electrical cable.

The towers also provided an extraordinary employment opportunity for the construction workers of the region. More than 3,500 people were employed continuously on-site during construction.

> A total of 10,000 people were involved in its construction. Tragically, 60 people were killed during construction.

During their lifetimes the towers were host to the birth of 17 babies and 19 murders.

Fifty thousand people called the towers their place of work and on many days tens of thousands visited.