3/28: Lanza's bedroom was an arsenal; U.S. says North Korea is increasing the risk of war

      |Police search warrants, unsealed for the first time, reveal that Adam Lanza's bedroom was filled with weapons and ammunition. But what police didn't find was his motive for the Newtown massacre; and, Defense Secretary Chuck Hagel said North Korean dictator Kim Jong Un is increasing the risk of war with his country's provocative actions and belligerent tone.

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