Update: the movie will be called "World Trade Center."

"Oliver Stone has begun shooting one of the first Hollywood films about Sept. 11 in New York -- without recreating the large-scale devastation that's all too familiar to residents who lived through the 2001 attacks.(...) Most of the major action portraying the World Trade Center collapse will be shot on a Los Angeles sound stage. And although news footage of the towers themselves will be shown during the film, it will play on television screens in the background. 'We're not doing the 'Towering Inferno-Titanic' version,' said Michael Shamberg, who's producing the Paramount film with his partner, Stacey Sher." Fulls story in the Hollywood Reporter