SEOUL -- South Korea has secured 273 million barrels of crude oil by the end of this year from four nations in the Middle East, presidential chief of staff Kang Hoon-sik said Wednesday.Kang, who returned home from his eight-day trip to Oman, Saudi Arabia, Qatar and Kazakhstan, said the nation also secured 2.1 million tons of naphtha by the end of this year."The 273 million barrels of crude oil, based on last year's consumption levels, are sufficient to sustain the economy for more than three months under normal operating conditions without the need for additional emergency measures," Kang …READ FULL ARTICLE