It was one of the most shocking events of modern times; an attack on an a scale previously unimaginable, and a day that should never be forgotten.
Using contemporary accounts, the stories of witnesses and survivors, and the words of the victims, I'll tell the story of 9/11.
This is a series in six parts. This episode gives an overview of the events of 9/11.
Visit www.greatdisasters.co.uk for the full transcript and more.
Check out the Great Disasters Podcast on Facebook, Twitter, and Instagram - let me know what you think of the show.