This hits home – it is very bad. Boston is our family’s second home town, where our youngest was born and the other two had formative years (as did we all.) Boylston street certainly is familiar and so is every Boston reference and place name now being repeated on CNN.

I am impressed by the police and various spectators and marathon officials – they immediately run to help the wounded, acting very sensibly, quickly coordinating to gain access to the bomb site and get to the wounded.

Let’s hope the aftermath of this event is characterized by the same calmness, relevance and restraint. The bombings in Oslo and shootings at Utøya two years ago gave rise to very solemn reactions and a surprisingly thorough and measured debate about immigration, extremism and the role of religion in Norway – as well as a thorough examination of security routines and the response of the police (which, unfortunately, was not as quick and coordinated as in Boston.

Let’s hope this can be an event to learn from, whoever the perpetrators may be. The Boston Marathon is very much an outdoor celebration – people happily cheering the runners along the route and everyone having a great time. It would just be too sad to have it changed and locked down by the insanities of people who think violence will gain them anything at all.