Were living through times when the essence of life is indeed disrespected, which is clearly an anathema.
A Hundred percent security for the public's safety is just impossibility. However, there are a number of ways to improve the public's current security.
One, as a suggestion is to have sensors on the entrance on all public buildings and including transport. Of course this is an expensive proposal particularly at a time when we hear the words cuts non stop from those responsible for our country. Yet, in truth we are still an extremely wealthy country and it is a proposal that can be implemented.
After all they have sensors in many department shops stopping people leaving with unpaid items and yet there is not item in the world that is more valuable, amazing and indeed to many of us scared then essence of life itself.