North Korea secures up to 300,000 tons of oil products from Russia each year through Singapore-based dealers, a defector who formerly managed funds for the leadership has told Kyodo News, posing a challenge for the United States as it seeks to isolate Pyongyang."North Korea has procured Russia-produced fuel from Singapore brokers and others since the 1990s...It is mostly diesel oil and partly gasoline," Ri Jong Ho, 59, a former senior official of Office 39 of the Workers' Party of Korea, said recently in the U.S. capital in his first interview with media under his own name.Ri also said Nort…READ FULL ARTICLE