These dramatic images were taken by police photographers in helicopters and it is the first time they have been seen, having been released under a Freedom of Information request made by America's ABC News.
Burning buildings can be seen crumpling in on themselves as plumes of smoke rise up over the New York skyline that terrible September morning.
The images show how the police helicopter first began taking images from afar before moving in to reveal the devastation taking place underneath.
They also reveal the horror faced by those trapped in the burning buildings and then the walls of smoke and debris that enveloped the surrounding area as the towers came crashing down.
Released more than eight years after the deaths of 2,752 people on that day, they are powerful reminders of the attack that led to wars in Afghanistan and Iraq.Read more: http://www.dailymail.co.uk/news/worldnews/article-1249885/New-World-Trade-Center-9-11-aerial-images-ABC-News.html#ixzz0fEq1zKmC