I agree with the comments above. This is a very sad event which like so many others, could have been avoided.

The issue of gun control is a vexed one. Australia had a tragedy of very similar proportions when a gunman killed over 30 people at Port Arthur historic ruins near Hobart in Tasmania in the 1990s. Sweeping gun controls were introduced, particularly relating to semi-automatic weapons. This took guns away from law abiding people, did little to remove guns from the hands of underground criminal elements, but did make it far far harder for the average person to get their hands on any sort of gun without good reasons, and without a cooling off period and police checks.

It is one thing to allow law abiding citizens the right to have guns, quite another to allow anyone - regardless of circumstances or state of mind - to buy high powered lethal weapons with as much ammo as they can carry with little or no control...

Just my 2c worth.