Of those Americans exposed to the collapse of the World Trade Center towers on September 11, 2001, about ________ percent developed symptoms of posttraumatic stress syndrome that were still present five to six years later.

Question

Quizplus · Accepted Answer

Approximately 10 percent of those exposed to the collapse of the World Trade Center towers on September 11, 2001, developed symptoms of posttraumatic stress syndrome that persisted five to six years later.

Of Those Americans Exposed to the Collapse of the World