Before I came to Glasgow, I anticipated that our time here would feel safe. By European standards, Glasgow doesn't have the best reputation for crime, but by the standards of most places I've lived it's really secure.
We chose to live in a nice southside suburb where people may twitch their curtains, but would never look inside your unlocked car. The residents of this wee corner of the world sometimes complain that nothing ever happens here but after years of electric fences and endless petty theft that suits me just fine.
I have felt safe here. I walk back from the station after dark on my own sometimes and we have even been known to leave our back door unintentionally unlocked from time to time (please don't tell my landlord), without incident.
And then, this afternoon, two people drove a vehicle into the check in area of Glasgow airport. It ignited, they were arrested and, although significant damage was done to the building, nobody was hurt. Actually that's not quite true. The two people in the car were taken to hospital with burns - I'm finding it difficult to feel too much pity for them right now.
The police now suspect that this is an act of terror linked to the discovery of two car bombs in London yesterday. And the UK is on full security alert.
I think it is human to feel a little less safe when terror breathes down our necks like this. But is it right? A terrible thing happened today. But will I be in any greater danger tomorrow than I was yesterday, when I felt no fear at all? Perhaps, but probably not.
Sadly, the success of terrorism depends on that 'perhaps' - the human response to an unpredictable event. In absolute terms, far fewer people will be directly effected by terror attacks than will have their lives effected by the fear these incidents generate. And then terror wins.
I passed through Heathrow on my way back from South Africa in August last year. It was the last time this country was on high alert and the launch of the liquid-in-hand-luggage restrictions. What struck me was how everyone just got on with it. The queues were unreal and the rumours very frightening. But the great British public know about queuing and developed a quiet camaraderie in the face of it all. There was no panic.
So, no. I am not going to bed afraid tonight. It's something I learnt while living in Scotland.