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if movie trailers are supposed to cause a reaction,the preview for "United 93" more than succeeds.Featuring no famous actors,it begins with images of a beautiful morning and passengers boarding an airplane.It takes you a minute to realize what the movie's even about.That’s when a plane hits the World Trade Center.the effect is visceral.When the trailer played before "Inside Man" last week at a Hollywood theater,audience members began calling out,"Too soon!" In New York City,the response was even more dramatic.The Loews theater in Manhattan took the rare step of pulling the trailer from its screens after several complaints.47.The trailer for "United 93" succeeded in ____________when it played in the theaters in Hollywood and New York City.