Likewise, my sympathy goes out to all who have been affected by this tragedy...
My girlfirend was in class in the Robert Menzies building at the time it happened. This kind of thing is just so close to home, it makes you feel as though you aren't safe anywhere. When I think about how close I was to loosing her (just one floor away), it really makes you re-evaluate your priorities in life.
Most people seem to disregard something like this when it happens overseas, perhaps dismissing it with some passing "oh, that's sad" comment, but when it happens right at your back door, it really gives you a stern wake up call.