By Michelle Meyers A New York Times report, triggered by the leak of new documents, sheds light on how US officials so quickly concluded North Korea was the source of the November hacking attack against Sony Pictures.

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Source:: http://cnet.com.feedsportal.com/c/34938/f/645093/s/427c4502/sc/21/l/0L0Scnet0N0Cnews0Cnsa0Ewas0Etracking0Enorth0Ekorea0Eback0Ein0E20A10A0Edocs0Ereveal0C0Tftag0FCAD590Aa51e/story01.htm