Wow, well I was only about five so I don't really remember what I was doing when it happened, probably just being like any other five year old. Archive.org has a ton of, obviously, archived news footage following the event; I have heard that there is only a few copies of footage of the first plane hitting the tower. The second plane, of course, hit and was seen on live TV. Watching that back is a little chilling. And then there's that video of the woman who only just got into a deli as the huge dust cloud advances down the street, and then they look out the shop window and it just goes pitch black. I can't find it now but I remember watching it recently.