There questions about the role recent structural changes may have played in the South Korean ferry disaster.
Families angrily confront officials over South Korea ferry search
Renovations made last year expanded the top floor of the ferry in order to make room for 117 more passengers.
Now, investigators want to know if the modifications, which added 180 tons to the weight of the ship, made the ferry more likely to capsize.
CNN's Chad Myers reports on what the cargo and renovations could have done to the ship.
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