Associated Press
U.S. Army soldiers prepare for an exercise during their annual military drills with South Korea in Yeoncheon, South Korea, near the border with North Korea, Tuesday, April 9, 2013. North Korea has unleashed a flurry of war threats and provocations over U.N. sanctions for its last nuclear test, and over the ongoing U.S.-South Korean military drills, which the allies say are routine but Pyongyang says is a preparation for a northward invasion.  (AP Photo/Ahn Young-joon)

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