A major Hollywood studio is to make a film about the fourth plane which was hijacked on 11 September 2001.
United Airlines flight 93 crashed in Shanksville, Pennsylvania
Universal will begin filming its account of Flight 93 in October, which crashed after passengers attempted to overcome the hijackers.
The movie, to be directed by British film-maker Paul Greengrass, will be a real-time account of the plane's hijack until its crash 90 minutes later.
A documentary about Flight 93 is due to be shown on US television next month.
According to trade paper Variety, the new film about Flight 93 has a relatively modest budget of $15m (£8.9m) and will be shot with hand-held cameras.
A cast and release date for the film has yet to be determined, although Variety has suggested that it could feature at next year's Cannes Film Festival.
Another big-screen version of the events of 11 September is being made by film director Oliver Stone.
Oliver Stone is making another film based on the events on 11 September
The film, starring Oscar-winner Nicolas Cage, will tell the story of two police officers trapped in the rubble of the World Trade Center in New York and is expected to be released next year.
Stone called it "an exploration of heroism in our country".
Paramount Pictures said in February that it had gained the rights to 102 Minutes, a book by US reporters about the interval between the impact of the first airliner and the collapse of the first tower.
Further television programmes about 11 September are also due to air in the US, including a two-part documentary on the National Geographic channel and an eight-part dramatisation on US network ABC.
It is believed that Flight 93, the fourth hijacked plane, was heading for the White House before passengers attemped to overcome the hijackers and steer the plane away from its intended target.