North Korea Military Tensions
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North Korean soldiers attend military training in an undisclosed location in this picture released by the North's official KCNA news agency, March 19, 2013.
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North Korea's artillery sub-units, whose mission is to strike Daeyeonpyeong island and Baengnyeong island of South Korea, conduct a live shell firing drill to examine war fighting capabilities in the western sector of the front line, March 14, 2013.
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The air force and air defense artillery units of of the Korean People's Army conducts a drill of drone planes assaulting targets in a picture released by the North's official KCNA news agency, March 20, 2013.
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Members of the United Nations Security Council vote to tighten sanctions on North Korea at the United Nations Headquarters in New York, March 7, 2013.