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North Korea tests rocket engine; second trial of US missile defense system fails
North Korea has carried out another rocket engine test apparently within the last 24 hours. U.S. officials say this type of engine could be used for a space launch but they fear it might actually be part of North Korea's program to develop an intercontinental ballistic missile. Meanwhile, a second “American” test of a new missile defense system failed this week when it was unable to shoot down a target missile over the Pacific Ocean.