South Korean army K-1 tanks move during an annual exercise in Yeoncheon, near the border with North Korea, Thursday, March 3, 2016. North Korea fired six short-range projectiles into the sea off its east coast Thursday, Seoul officials said, just hours after the U.N. Security Council approved the toughest sanctions on Pyongyang in two decades for its recent nuclear test and long-range rocket launch. (AP Photo/Ahn Young-joon)
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