If you look at the link I posted, the number of registered guns in the USA has dropped significantly in recent years. There is some other very significant information there regarding states with gun laws vs those without. Look at where the guns are more prevalent, at where the laws are more restrictive at where the worst events have occurred. There is no significant correlation.

It is, imo, contemptibly stupid to believe that gun restrictions will make a difference. It is a waste of time, money and energy. Those who want them will find them, regardless. It is as feckless as restricting illegal drugs. Zero-tolerance did not solve the problem; neither will gun laws.

There are guns in Canada; we could conceivably have these types of events; did have the one in Quebec some years ago. But basic attitudes are totally different. There are highly significant historic/sociological differences. The USA has some serious work to do on changing the way it looks at the world and at lives of humans, and all animals. It does not seem to place as high a value on life as some of the more civilized countries. If it did, it would not be killing people in other countries, thereby setting a horrendous example for its young people. It is a militant-minded country that extolls the use of violence in TV, everywhere, and this attitude invades every aspect of life. Just look at "Stand your ground". It is legal to kill people.

Boy, am I ever fed up with that stinking attitude.

That young man was also a young child once. How 'bout looking at what went wrong in his life, or never went right, that brought him to the point of killing his mother and going on a killing rampage. That is where the answers are, where the time, money and energy could be well spent. How do we help each individual grow into the kind of person who nurtures, rather than kills? Hard to do in a country that extolls violence - but most people manage it.

Interesting that no one has mentioned Nickel Mines?