Every family with links to Flight 93 were asked permission and all support the movie being released.
The real United 93 crashed in a Pennsylvania field after 40 passengers and crew fought back against the terrorists who had hijacked the plane. Writer-director Paul Greengrass ("The Bourne Supremacy") has gone to great lengths to be respectful in his depiction of what occurred, proceeding with the film only after securing the approval of every victim's family. "Was I surprised at the unanimity? Yes. Very. Usually there are one or two families who are more reluctant," Greengrass writes in an e-mail. "I was surprised and humbled at the extraordinary way the United 93 families have welcomed us into their lives and shared their experiences with us." His team's research was meticulous. "They even went so far as to ask what my mother had been wearing on the plane," says Carole O'Hare, whose 79-year-old mother, Hilda Marcin, died on the flight. "They were very open and honest with us, and they made us a part of this whole project."

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