This glimpse of Flight 93 (out April 28), the first feature film focused specifically on the terrorist attacks of Sept. 11, doesn’t offer much in the way of imagery — but that doesn’t mean it won’t send chills up your spine.

Director Paul Greengrass (Bloody Sunday, The Bourne Supremacy) recently told the New York Times that, using cockpit recordings and the content of phone calls from passengers to loved ones, he’s putting together what he calls ”a believable truth” about what happened on Flight 93, the hijacked United Airlines plane that crashed in a Pennsylvania field. The clip opens on a black screen, with sounds of a normal takeoff — the pilot and crew welcoming passengers, the roar of the engines. But then, over computerized imagery of the flightplan, we hear a commotion, and a woman’s recorded voice: ”Honey, it’s me. My flight has been hijacked.” Then, the dialogue of passengers planning to overtake the terrorists, followed by a single, shaky shot of the plane’s cabin (above). Needless to say, the trailer is very unsettling, and — to me, at least — somewhat reminiscent of the way Michael Moore handled the attacks in Fahrenheit 9/11: a black void as you hear the tragedy unfold.

Last August, 59 percent of voters in an poll said it’s disrespectful to make a movie about Flight 93, especially since it’s not known exactly what happened during those 90 minutes the plane was in the air. What do you think? Is it still too soon for a fictionalized account like this — or for the other 9/11-themed movies in the works?