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PYONGYANG, NORTH KOREA - APRIL 02:  A national flag waves on Parliament roof on April 2, 2011 in Pyongyang, North Korea. Pyongyang is the capital city of North Korea and the population is about 2,500,000.  (Photo by Feng Li/Getty Images)
PYONGYANG, NORTH KOREA - APRIL 02:  A national flag waves on Parliament roof on April 2, 2011 in Pyongyang, North Korea. Pyongyang is the capital city of North Korea and the population is about 2,500,000.  (Photo by Feng Li/Getty Images)

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U.S. should 'thicken up' missile defense near N. Korea

Former U.S. Ambassador to South Korea Christopher Hill says he takes North Korea threat of 'mini nukes' very seriously.

U.S. should 'thicken up' missile defense near N. Korea

Former U.S. Ambassador to South Korea Christopher Hill says he takes North Korea threat of 'mini nukes' very seriously.