I was only 3 years old when the attacks happen. I remember being at my babysitters house and her shooing me to the next room so I wouldn't be scarred mentally. If you are able to watch it without breaking out in tears, I recommend watching the documentary "102 Minutes That Changed America". They're clips filmed by average people and newscasters while the attacks are going on. It's very good.
My love and condolences go out to the the families that lost someone.
Bless you. Love you.