NEW REPORT: Nuclear North Korean Weapon is Possible

President Barack Obama says now is the time for North Korea to end its belligerence. He says the United States will take, in his words, "all necessary steps" to protect its people. Obama's stern comments came as new U.S. intelligence was made public showing North Korea probably has advanced its nuclear knowhow to the point that it could arm a ballistic missile with a nuclear warhead, though the weapon wouldn't be very reliable.

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