Here is a video from lds.org which shows a 9/11 survivor and his story. He shares his memories of that day and his escape from one of the falling towers, and then speaks about the difficulties he faced for years following 9/11.
The hope that this man found was in Christ, and his ability to care for each of us, and make us whole. We each have a need to be whole, and only our Savior can meet that need by making up for our lacks and mistakes.
This is a good video, and a good reminder of what happened on 9/11, and how it affected the world, and each of us individually. During this time of remembering, I hope everyone will turn their lives more toward Christ, and his teachings.