9/11 was not significant in the world, only in the western world, do not get too self important about this event please. It was a pin prick in the global scale lets get real people.
A bloody painful pin prick to the 3000 plus who lost their lives. A pin prick that caused the US and its Allies to try get stuck into the baddies (fanatics) in Afghanistan and a pin prick that cause huge security measures to affect air travellers world wide. Anyway, the question is still unanswered. What is significant about 1989 in Australia?