U.S. Secretary of State John Kerry says it would be a "huge mistake" if North Korea follows through on its threat to conduct another missile test that officials warn could happen at any time.
Tensions on the Korean Peninsula
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North Korean children hold up red scarves to be tied around their necks during an induction ceremony into the Korean Children's Union held at a stadium in Pyongyang, April 12, 2013.
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Two military officers admire displays at a flower show featuring thousands of Kimilsungia flowers, named after the late North Korean leader Kim Il Sung, Pyongyang, April 12, 2013.
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South Korean soldiers stand guard at an observation post near the demilitarized zone (DMZ) which separates the two Koreas in Paju, north of Seoul April 11, 2013.
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Female North Korean soldiers patrol along the banks of Yalu River, near the North Korean town of Sinuiju, opposite the Chinese border city of Dandong, April 11, 2013.