The Dunblane School shooting. When I heard the news my first thought was absolute horror, with a sigh of relief that I would not know anyone involved. This turned out not to be true. Once the news spread and names were released, I realised that I, and most people for miles around did in fact know, if not the victims, then their Parents, Grandparents, Aunties, Cousins or someone in the Emergency services, Local Undertakers, etc., who was caught up in the aftermath. My DH was shocked to realise that he did in fact know the killer via the Scouts and through having been a customer in his shop.
A tragedy like that creates sorrow that affects a whole community at once and can never be forgotten. When we hear news of yet another School shooting in the US, it brings it all back afresh as if it was yesterday.