A crowd of people bow their heads for a moment of silence Tuesday during a remembrance ceremony in front of the salvaged Sewol ferry at a port in Mokpo, South Korea. The event marked the 10th anniversary of the sinking of the vessel, which left 304 people dead, including 250 high school students. Photo: Anthony Wallace/AFP

Workers prepare the hull of the Sewol ferry to be cleaned on April 12, 2017, after the sunken vessel was brought onto land on the third anniversary of the deadly incident. Photo: VCG

The wreckage of a car that had been on the Sewol ferry sits nearby the salvaged vessel at the port in Mokpo on Tuesday. Photo: VCG

Rescuers head out toward the sinking ferry on April 17, 2014. Photo: VCG

A family member of one of the passengers on the ferry waits near the water on the morning of April 18, 2014 — more than 40 hours after the incident. Photo: VCG

At a protest in Seoul on Feb. 21, families of the victims demand that South Korea’s National Intelligence Agency release information about the incident. Photo: VCG

Shoes and other items owned by the high school students who died when the Sewol ferry sank sit on display at an exhibition marking the 10th anniversary of the incident at the Ansan Culture and Arts Center in Ansan, South Korea. Photo: VCG

Jeong Sung-wook holds a woodcut portrait of his late son at his home in Ansan on Saturday. Jeong Dong-soo was on the students who died when the Sewol ferry sank. Photo: VCG