Sigh, yes *some* things have changed..unfortunately none of them are the right things.
It was a shocking event no doubt, but to be quite honest it's already a fading memory. My immediate response when it happened was "wake-up call" and "well, thats what we get for being such arrogrant assholes". We have already hit the snooze button and as a nation we are as arrogant as ever (if not more so).
There are far more tragic things that happen in this world on a daily basis, it's a shame that so much emphasis is/was placed on an event which is only slightly larger (if at all) than some of the things other countries routinely deal with.