Good point Phil. I just wanted to point out that it is possible to live in a country with little gun violence but don't agree that the Australian people have been victimized for the last 20 years because they can't carry. 
No doubt we will continue to experience mass shootings here in America because disarmament is simply not an option and there are so many holes in our vetting process.  I guess we might as well just get used to it whether we are ok with it or not.