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Was the Sony hack an 'act of war'?
More screenings canceled as U.S. officials and cybersecurity experts grapple with how to respond to threats of violence and hacking.
Bidding adieu to Betamax00:58
Was top Sony executive Amy Pascal forced out?03:26
Sony Pictures shake-up02:10
Advice columns that explain the news01:49
Report: NSA hacked North Korea pre-Sony hack06:41
US wary of North Korea war fantasy08:05