The United States and its ally South Korea have drawn up a contingency plan to cope with emergencies in North Korea, including a possible regime change there, a report said Sunday. "Operational Plan (OPLAN) 5029" was completed by Seoul and Washington recently, Yonhap news agency said, quoting an unnamed Seoul source. It dictates how to respond case-by-case to such emergencies in North Korea as a civil war, an outflow of weapons of mass destruction (WMDs), a mass influx of refugees or a natural disaster, Yonhap said. Under the plan, the United States assumes the role of eliminating North Korea's WMDs,...