With horror and dismay we watched yesterday as news broke about two terrorist attacks in Oslo. The first was a bomb blast in Regjeringskvartalet, the government quarter of the city, in which there have been seven confirmed deaths and many more injured. The second, a mass shooting on the island of Utøya, where the AUF (the youth wing of the Norwegian Labour Party) was holding a summer camp for 500 or so of its members, and in which reports now suggest more than eighty young socialists were killed,...