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Kim Jong Un is pictured after what North Korea said was the test firing of a ballistic missile Saturday.
Kim Jong Un is pictured after what North Korea said was the test firing of a ballistic missile Saturday.

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    Seoul: North Korea developing submarine missile system

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Seoul: North Korea developing submarine missile system

A South Korean defense official says North Korea could have a fully operational submarine armed with ballistic missiles in 4-5 years. CNN's Kathy Novak reports.

Seoul: North Korea developing submarine missile system

A South Korean defense official says North Korea could have a fully operational submarine armed with ballistic missiles in 4-5 years. CNN's Kathy Novak reports.