As usual, though, the researchers who studied the effect of 9/11 on
school children apparently never bothered to read Freud's and Breuer's
book "On Hysteria" which clearly explained the phenomenom of
psychological vulnerability to subsequent trauma. What is especially
aggravating is that nobody mentioned Freud's later theories of primary
and secondary repression, which the following study validated perfectly!

http://www.nytimes.com/2008/02/05/health/research/05trau.html?
ex=1359954000&en=f24c970302f7f947&ei=5124&partner=permalink&exprod=perma
link

Larry