The Zarqawi killing and the appointments to his cabinet — an almost equally important development — couldn’t come at a better time. Well, actually, they could have come at a better time, like right after the election and the formation of the government. But this news is so good for Iraq and the war effort. Read David Ignatius’ column from yesterday for a sense of how dour things have gotten. We can only hope this creates one of those virtuous cycles where success builds on success.