The United States and South Korea have reportedly drawn up joint plans for a retaliatory set of tit-for-tat responses to any strikes by North Korean on its neighbour. The scale of the response has been set down in a new war plan to ensure that there is no unintended escalation into broader war. The new "counter-provocation" plan is calling for an immediate but proportional "response in kind" to North Korea if it decides to launch a ground attack or a missile, the New York Times reported last night, citing unnamed US officials. Under the plan, the source of any North...