The film’s budget was only 15 million U.S. dollars, which made director Paul Greengrass not follow the same route as Oliver Stone who hired Oscar actor Nicholas Cage to star in the casting, but chose a bunch of famous people. Large, but similar to the appearance of the passengers boarding the same day, but also have a certain performance foundation and aviation experience
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Although the 911 incident is well known to the world, the details of the incident are not clear, especially what happened on the United Airlines Flight 93 that crashed midway, in order to reshape the scene of the dead flight and the tragic catastrophe of 911. Paul Greengrass spent many years on difficult tasks such as the tragic scenes of the rest of his life. He spent many years in interviews with the families of passengers, crew members, members of the 9/11 investigation team, ground personnel, and other informed soldiers and even civilians, spending countless hours to go. Collect relevant information and shooting materials
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