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North Korea conducted a third nuclear test on February 12, 2013 defying existing UN resolutions. A map of the Korean peninsula showing locations of nuclear tests (Credit: Defense Department, State Department, CIA World Factbook, GlobalSecurity.org, AP and USA TODAY research By Kevin A. Kepple, Jeff Dionise, Oren Dorell and Bill Dermody, USA TODAY)

North Korea conducted a third nuclear test on February 12, 2013 defying existing UN resolutions. A map of the Korean peninsula showing locations of nuclear tests (Credit: Defense Department, State Department, CIA World Factbook, GlobalSecurity.org, AP and USA TODAY research By Kevin A. Kepple, Jeff Dionise, Oren Dorell and Bill Dermody, USA TODAY)