Construction on the North Tower of the World Trade Center kicked off in later summer, 1968, and work on the South Tower began about six months later. The massive towers were built using metals from U.S. Steel and Bethlehem Steel with hundreds of laborers contracted to erect the steel and iron framework, including these high-flying men. If you think this looks like a dangerous job, you’re right. Between the time work started on the building and when the job was completed, 60 workers were killed on the job. Six workers died in 1970 when a truck struck a propane tank and exploded. Although the Towers were finished in 1970 and 1971, the official dedication wasn’t held until 1973.
