N.Korea enlarging site for bigger missiles: institute

North Korea appears to be expanding its main launch site to permit more advanced missiles which may eventually be able to reach the United States, a think tank said Wednesday.

Analyzing satellite images of the Sohae launch site over the past two months, Johns Hopkins University's US-Korea Institute said North Korea apparently tested a rocket engine needed for its road-mobile KN-08 intercontinental ballistic missile.

The evidence indicates that North Korea may be preparing "for a more robust rocket test program in the future," said the institute's blog, 38 North.

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