That is the question.
There is a motive behind every crime, even suicide, or homicidal suicide and too there is a solution to even the most complex security dilemma,
We can do infinitely more to help people who are so depressed that they want to die and they want the whole world to die. Money can do a lot of good things, but we need more of it.
It is also the case that every tragedy has a price-tag solution on its head. There are doable security measures that would have stopped every one of these mass killings, including 9-11.
The fact is We Can Do it, but Will We?