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South Korean Coast Guard officers search for missing passengers aboard a sunken ferry in the water off the southern coast near Jindo, South Korea, Thursday, April 17/
South Korean Coast Guard officers search for missing passengers aboard a sunken ferry in the water off the southern coast near Jindo, South Korea, Thursday, April 17/

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    Expert: S. Korea waterway requires skill

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Expert: S. Korea waterway requires skill

CNN's Erin Burnett talks to William Doherty about the doomed South Korea ferry navigating through treacherous waters.

Expert: S. Korea waterway requires skill

CNN's Erin Burnett talks to William Doherty about the doomed South Korea ferry navigating through treacherous waters.