"Wasn't there speculation post 9-11, about airline stocks being sold prior to the attacks? Did anything ever come of investigating leads into the stock market aspect of dumping certain stocks?"
I do not have a link for you however if memory serves me there was nothing proved in the now completed investigation.
I don't have a link either, but I believe I read just in the last week or so that they couldn't find any connection. Seems to be a common theme these days.