![A close-up of the original World Trade Center's Twin Towers under construction in 1971 as seen from the Hudson River in New York City, New York, USA. The building of the North A close-up of the original World Trade Center's Twin Towers under construction in 1971 as seen from the Hudson River in New York City, New York, USA. The building of the North](https://c8.alamy.com/comp/P8APE2/a-close-up-of-the-original-world-trade-centers-twin-towers-under-construction-in-1971-as-seen-from-the-hudson-river-in-new-york-city-new-york-usa-the-building-of-the-north-tower-left-began-in-1968-and-the-south-tower-in-1969-both-structures-had-been-completed-and-occupied-for-a-decade-before-they-collapsed-on-september-11-2001-after-being-struck-by-two-passenger-jetliners-hijacked-by-terrorists-a-total-of-2606-people-died-in-the-buildings-during-the-disaster-at-one-time-these-towering-twin-structures-of-the-first-world-trade-center-wtc-were-the-tallest-buildings-in-the-world-P8APE2.jpg)
A close-up of the original World Trade Center's Twin Towers under construction in 1971 as seen from the Hudson River in New York City, New York, USA. The building of the North
![Fearless construction workers at One World Trade Center dangle over 1,000 feet above NYC | Daily Mail Online Fearless construction workers at One World Trade Center dangle over 1,000 feet above NYC | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2012/07/25/article-2178549-1430327B000005DC-118_1024x615_large.jpg)
Fearless construction workers at One World Trade Center dangle over 1,000 feet above NYC | Daily Mail Online
![Fearless construction workers at One World Trade Center dangle over 1,000 feet above NYC | Daily Mail Online Fearless construction workers at One World Trade Center dangle over 1,000 feet above NYC | Daily Mail Online](http://i.dailymail.co.uk/i/pix/2012/04/30/article-2137005-12D93429000005DC-161_964x706.jpg)