https://www.youtube.com/watch?v=BGLfSn4LBuY This chilling audio recorded from a 911 call gives a horrifying insight into the final moments of the World Trade Center office workers on September 11th, 2001. The call, made by business executive Kevin Cosgrove, took place just minutes before the first tower collapsed. The recording was used during the trial of Zacarias Moussaoui, as part of the only criminal trials that resulted from the attack. What's the eeriest piece of audio you've ever heard? Are there any we should have included here? Let us know in the comments below.