I just watched it and it's a very emotional trailer. I still think its really too soon for a movie of this magnitude. Upon watching this trailer, I immediately had a hard time getting through it, as my mind began to really think and picture how those officers, firefighters, and good samaritans were actually in the collapsed tower.
It looks like a good movie, however, no way am I going to attend this movie because the overall content is too deep and too soon these days.
But I'm sure some will see it and will be very moved by it too.