Stopping him is an entirely different story. He has control. Even when authorities realize there is a good chance there is a bomb in the backpack, how do you stop him? It would have to be stun gun or something that paralyzes, but, what happens when he loses control of his hands and falls to the ground?
It is a very difficult situation.
Police would have to clear an area around him and then seek to paralyze him and let it happen. If he is successfully stopped and the bomb hasn't gone off then the approach has to be cautious. It would mean bomb squads have to adapt an entire protocol to deal with it. And if the authorities are wrong and the man is innocent, then what?
Personally, I don't see him as innocent even if he is and it would have to be recognized as a mistake with no charges if authorities are mistaken. It is illegal search and seizure. But, when it comes to public safety that sort of thing goes on. I would think dogs roaming the concourse would solve the problem as well. But, it would only alarm the bomber if the dogs were brought in and not simply patrolling as a standard measure.
I really think dogs would be effective. If they were present on a regular basis, it would act as a preventative as well as an intervention. But, the dogs would have to have a subtle signal to alert their handler. Nothing that an ordinary person could discern as a signal.
That level of hatred is unknown to me. To kill oneself in order to kill others. What did he think he was going to accomplish by killing so few people? We come back to Anders Breivik again. Young people travel by bus a lot. These self righteous idiots think they are Hitler and can wipe out entire populations if only there are enough of them.
That is pure stupidity.
One has to wonder what goes on in the mind of a man ready to kill himself to achieve a goal. Life is not about living to fight in honest political wars to achieve what is best for a society? They need a political platform with an honest debate. They don't stop to realize the reason they can cause harm to others is because there government is one of freedom?
They are demented. They are demented by the 'idea' of personal power. They can achieve the ultimate ideological definition of their life. There is no mental health in that. Ideological goals are not those of freedom or democracy. A democracy is about community. The goals of a society as expressed through choices of the majority. They are demented by fear of their own ideas of losing identity within a democracy.
Crazy. That is crazy.