Obama's "town hall" webcast

President Barack Obama holds a "town hall" webcast on the economy and jobs on Twitter

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North Korea denies hacking Sony, U.S. stands by its assertion

SEOUL/WASHINGTON - North Korea said on Saturday U.S. accusations that it was involved in a cyberattack on Sony Pictures were "groundless slander" and that it wanted a joint investigation into the incident with the United States. | Video