Of course there is. You've got to remember that the idea of right and wrong, i.e. what should and shouldn't happen, is relative to the person thinking of it. A more enlightning question, if you allow me to give, would be 'did anything beneficial happen due to the 9/11 attack?'. That depends on the person too, but not on her thoughts, so I'd say is less relative and more easily answerable. Sorry if that's all I can say, I don't know anything about the attack but thought I could offer insight into what question to make at least.