All the movie is a real compilation of amateur footage about more of 100 people who were in the World Trade Center and around, with no narrators nor interviews. Most part of the images and conversations were unused for the public eye, no seen previously in TV News nor other documentaries.
Around 1 hour and 15 minutes into the documentary, there's more footage of people reacting in Times Square. One man is asked how it makes him feel. Sarcastically (presumably), he replies it makes him happy. If you look in the background behind him, you can see a poster for the Arnold Schwarzenegger movie "Collateral Damage". A film about a firefighter who loses his wife and son in a terrorist bombing. The film was set for release 5 months after September, 2001.