On the fifth anniversary of the Sept. 11 attacks against the United States, only 22% of Americans say they have permanently changed the way they live as a result of 9/11. Slightly more, 30%, remain less willing to travel by airplane, down from 43% in 2001. Most believe another terrorist event is likely, but only 37% predict terrorists will succeed in repeating the tactic of crashing a hijacked airplane into a building.
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