North Korea sparks crisis over workers from South.
Paju, South Korea (CNN) -- North Korea on Wednesday stirred upfresh unease in Northeast Asia, blocking hundreds of South Koreans from entering a joint industrial complex that serves as an important symbol of cooperation between the two countries. The move comes a day after Pyongyang announced plans to restart a nuclear reactor it shut down five years ago and follows weeks of bombastic threats against the United States and South Korea from the North's young leader, Kim Jong Un, and his government. The fiery North Korean rhetoric, fueled by recent U.N. sanctions over its latest nuclear test, has created a tense atmosphere on the Korean Peninsula just as the United States and South Korea are engaged in joint military exercises in South Korean territory. Pyongyang's threat last month of a possible pre-emptive nuclear strike on the United States and South Korea caused particular alarm, despite heavy skepticism from analysts and U.S. officials that the North Korean military is anywhere near capable of carrying out such an attack.
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