Director Paul Greengrass (The Bourne Supremacy) keeps it pretty close to the vest with this film about the doomed passengers of United flight No. 93 (the ones who provided Bush with his "Let's roll!" catchphrase). A cast of unknowns dutifully acts out the events of that tragic day in real time, providing not so much dramatic insight as unflinching recreation. You witnessed it on the news, you relived it in the TV movie Flight 93. Now, you can see it some more.90 minutes R.