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The events of 9/11 had a powerful psychological impact for many Americans. Health researchers found elevated levels of depression, anxiety, and posttraumatic stress syndrome among American adults and children after the attacks (Galea et al. 2002; Schuster et al 2001; Silver et al. 2002). These reactions are in line with one of terrorism’s central goals-to induce fear and anxiety in people through focused acts of brutality and violence that gain broad publicity (Crenshaw 1986; Jacobson and Bar-Tal 1995; Long 1990; Wardlaw 1982).
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Huddy et al. (2004) studied this question.