I was around 14 years old when this tragedy occurred, saw it on news channel, there was chaos all around, even after 20 years we can never forget what happened on that day, so many innocent people lost their lives for no reason. This documentary was very well made, respect to the firefighters and all of them who helped others risking their own life, I will recommend this documentary.

I keep thinking I've seen all the 9/11 footage there is, but then new documentaries keep proving me that wrong. This is worth watching for some (potentially) new footage and viewpoints alone, although there is still a lot of familiar shots throughout.

Most affecting moment might have been a newsreader commenting on how hard the plane collision replay was to watch, because now, all these years later, I've been so desensitised from seeing the collisions so many times. I assume others would feel the same in regards to being desensitised, and it drives home the idea of how different things would have been before that day.

Presentation wise this does a solid but not quite amazing job at constructing a narrative out of almost just amateur footage. It's not the best 9/11 documentary out there, but it's a pretty good one.

Whilst not a technically groundbreaking documentary, the importance and power of the mostly new images of what regular people shot with their cameras on 9/11 is the closest you'll get to having been in New York on that day and shows the side that this kind of events tend to not show: the one of the regular people trapped in them. The only thing that it can't really transmit is the fear of not knowing what was going to happen next (that the ones that we saw it live, even in the TV news, will never forget),because everybody now knows how events unfolded. A must see.