USUALLY, there is a familiar cycle to Korea crises. Like a street gang showing off its power to run amok in a well-heeled neighborhood, the North Koreans launch a missile over Japan or set off a nuclear test or stage an attack — as strong evidence indicates they did in March, when a South Korean warship was torpedoed. Expressions of outrage follow. So do vows that this time, the North Koreans will pay a steep price. SNIP The White House betting is that the latest crisis, stemming from the March attack, will also abate without much escalation. But there is...