In Australia, it is extremely rare and usually makes headline news if someone shoots someone else, and it is even more rare if it is a mass shooting. One of the biggest mass shooting in Australia in the last century was at Port Douglas in 1996. That's 25 years ago. We have had a couple of terrorist or similar attacks, but apart from rival bikie gangs or drug deals gone wrong, it is very, very rare.

When I look at news about shooting events in the USA, it seems to be perceived as commonplace, almost like an accepted norm in society.

I don't get it. How can that be socially normal in a highly developed country?

Our firearm laws and firearm controls are very strict. It's not easy to buy a firearm. You need a gun licence. The Police control the licences. It is well controlled and socially responsible.