CNN CNN Newsroom April 24, 2014 14:26:00
Theories of what could have triggered this disaster. too little ballast water and too much cargo puts the ship in danger, says this man, a senior researcher with japan's national institute of fisheries engineering. using weights to simulate shipping containers, he shows how unsecured cargo can shift to one side with catastrophic consequences. >> translator: the result is the ship capsizing. the worst-case scenario. >> reporter: a south korean opposition lawmaker who represents jindo says renovations last year expanded the top floor to make room for 117 more passengers, making the center of gra...