Heinz, I hadn't realised the market that suffered the lorry attack was unprotected but you never realise threat until it's too late and then you can make a plan.
We have weak government here also and it leaves the door wide open to the loony right wing parties like Farage (the pferde arse and Trump lover) so it is always a concern for the general public.
I share your view and that the perpetrators of such dreadful tragedies are best dealt with at the time on site.