I thought I heard on the news that despite the car at the hospital being connected to someone involved/being held in connection with recent events that initial forensic investigation found nothing to indicate that it had any kind of device/bomb in it?
Also, I wouldn't be so hasty as to say that we had no prior intelligence. The speed by which they closed Edinburgh and Liverpool and how quickly they managed to locate houses and properties for searches and make further arrests suggests that they had some information on these people and their possible intentions.
I am in little doubt that this was a serious, although poorly executed, terror attack. The only people who will know exactly who or how many they intended to injure/kill are the terrorists themselves, and despite the relatively fortunate outcome (for joe public) you can be certain they won't be viewing this as a failure. They sent the UK and North America in to a state of panic and above all else that is the objective for these people.
Don't let this be turned in to some kind of game of politics, or be led down the path that an Independent Scotland would in any way be less effected. Terrorism is a world wide problem and is something we all have to be aware of.
I'll also echo what Scotty said above. I too flew to the states not long after 9/11 and was extremely anxious about the whole deal. However, I was no more anxious than I was when I sailed from Hull to Zeebrugge shortly after the Zeebrugge disaster which was an accident. Things happen every day which threaten our well being - some by accident, some by design. You have 2 choices, hide yourself away in your home (which poses just as many threats every day) or get on with your life. Not saying we should ignore these threats and we all need to learn to be a little more alert to our surroundings, but if we give up and hide away then these people win.