It was over ten years ago, as Sarah says some will never get over it but people would find life easier if they didn't cling onto the past. Life is for the living.

I went to a Jewish day school and every morning at prayers one of the teachers would say Kaddish (prayer of mourning for those jews who died in ww2.So yes, people should not forget but we cannot be miserable about death for our whole life.

There are numerous comedies made about war or regarding war,humans need to realise that life goes on. People have died because they wanted to transition and weren't given the freedom to do it. How is that any less painful than dying during that event?

If it's just the background event for the story, I don't see any problem. If it's integral to the story (in that, for example, your character takes the attack personally and spends her life seeking revenge), I'd be a bit bothered about it if the story concluded that someone other than al-Queda was in fact to blame for the destruction of the towers. (Only because it would make me feel that the story was incidental to the conspiracy theory.)

Eric

It's mind boggling the number of people telling you not to do this story. That's silly. Write what you want, about what you want, and relate it HOW you want. That's the freedom of being a writer. If you think there's a story to tell then tell it! Don't ever let yourself be held up by other people's opinions.

That's the trap a lot of authors on this site fall in to. "So-and-so made a nasty comment so I'm pulling all my stuff" or "I didn't get as many views as I wanted so I'm abandoning this story." It shouldn't matter; who cares what so-and-so thinks? You write because you like writing or so I should think. If you do it just for popularity then it will reflect in your work and seem shoddy.

Write your story.