The police couldn't win, whatever and whichever way they reacted. Don't shoot? The suspected suicide bomber kills you and everyone on the train.
Shoot? You are a hero for killing the suicide bomber - "oh, Jesus, that guy wasn't the one, oh, God, I was told he may have been".
You have literally seconds to decide, your adrenalin count is off the scale....not a situation any person would wish to endure. OK. The police get paid to be in this situation. How would you react in this situation? Give it a lot of thought. You have more time than the guys on the scene....
I'm equally appalled an innocent man was killed, I feel every sympathy for his family.
Shit does happen.
I could go on...my son is a policeman, but doesn't carry a firearm.
This was an occurence that should not need the resignation of a senior police officer who has served his area long and well, from all acccounts.
Humble Opinion, open to discussion...