None

2 planes crash into the World Trade Center, one very clearly.

People are shown jumping out windows. Not gory, but the fact that this is actual footage of real people falling to their death is disturbing.

Several images of injured people, blood on some of them.

A few uses of "fuck", "shit", all out of shock and horror and disbelief.

None.

This is a film about the attack on the World Trade Center, so it is bound to shock and sadden people, especially children. There is footage of people falling to their deaths.