In this April 17, 2014 file photo, South Korean Coast Guard personnel search for missing passengers aboard the sunken South Korean ferry Sewol in the water off Jindo, South Korea. Salvage workers are slowly pulling up the huge, corroded South Korean ferry above the sea surface Thursday, March 23, 2017, about three years after it sank on its routine voyage to a resort island, killing more than 300 people, mostly high school students. (Photo by Ahn Young-joon/AP Photo)
