De Niro's film festival opens
The Tribeca film festival, founded by Robert De Niro, opens today with the world premiere of a movie about the September 11 terrorist attacks.
United 93 is set on the plane which crashed in Pennsylvania after its passengers fought with hijackers.
Robert De Niro, who created the festival to help revitalise lower Manhattan after the events of 2001, said "it would seem strange" not to show the movie.
Several of the festival's 275 films also tackle the impact of that day. These include documentaries about a fire department chaplain killed at the World Trade Center - entitled Saint of 9/11 -
and also The Heart of Steel, about volunteers who helped victims of the attacks.
Robert De Niro acknowledged that "some will be ready, and some will not be ready" for 'United 93'.
Some cinemas in the US have already pulled trailers for the film after audiences became upset.
