I read some terrible news in the Guardian today about a tragedy in California. A father of five, who had lost his job, had killed all five children, his wife and eventually himself. How can somebody get that desperate? It seems unfathomable. At the time I was sitting facing the mantelpiece where I had only yesterday put up a newly made frame with two photographs of my son's family. My eyes moved back and forth between the newspaper and the mantelpiece, and my heart was filled with both sadness and joy, and then my eyes started filling up. I think my tears were of joy, and here are the pictures that make me feel very lucky.