YTN newsroom footage (Photo: Al Jazeera/YouTube video)

Computer networks at two major South Korean banks and three broadcasters crashed Wednesday, prompting speculation of a cyberattack by North Korea. But South Korean authorities say there's no conclusive evidence yet to determine who is responsible. Anchor Marco Werman speaks with Jong Sun Noh, a professor of peace studies and political ethics at Yonsei University, in Seoul.

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