Sony Hack is 'US security issue'

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North Korea is suspected of the hacking episode that has forced Hollywood to dump a $44 million movie. The White House announces it is a matter of national security, but what can actually be done? We hear from a former senior US Commerce Department official who was responsible for enforcing international sanctions against North Korea. Meanwhile, a report reveals Islamic State are also suspected of online combat - using malware to snoop on their opponents in Syria. Plus the BBC finds poor working conditions in some Chinese factories making Apple products and we hear about a mighty hydro-electric dam bringing power to Zambia and Zimbabwe. From Washington, we are joined by Alexis Goldstein of The Other 98% and from Singapore, by Simon Littlwood, director of Asia Now consulting group.