And now we'll go to Ansan, just south of Seoul, where the government is holding an official memorial ceremony.
Thousands of people have come out to remember the victims of the Sewol-ho tragedy.
Our Park Hee-jun is at the site for us.
Hee-jun, what's the latest?
Devin, I'm at the Hwarang Amusement Park in Ansan, Gyeonggi-do Province, where the memorial service began an hour ago at 3 PM.
The city is home to Danwon High School, which lost more than 260 of its students and teachers to the Sewol-ho disaster.
Around 5-thousand people have come to the service to pay their respects, including Prime Minister Lee Nak-yon, political party leaders, and of course, the families of the victims.
The two-hour program includes various commemorative performances along with religious services.
A floral tribute has also begun, and that will be the last part of the ceremony.
It's definitely a sad and mournful atmosphere here.
There's been a lot of tears and heartbreak as the visitors recall the tragedy.
I got a chance to hear from some of the people who are here for the victims who died four years ago.
"As a parent myself, I feel terrible every time I come here. I came today, because it's the only time I can be with the victims."
"My eldest child is the same age as the victims. That day, I saw my son come back from school, and could not imagine what the victims' parents must have been going through. I think this is the only way we can be with the victims, so I came."
I understand that today will be the last chance for people to visit the memorial in Ansan?
That's right, Devin.
After the service, the memorial facility will be pulled down and be turned into a memorial park for the victims and their families.
Everything from photos to records, will be sent to the National Archives of Korea, which is also what the families of the victims have said they want.
But there are mixed feelings because for four years it has been an important place for people who wanted to pay their respects to the victims.
More than 720-thousand people have visited the memorial hall, but after today, they won't be able to come back until the memorial park is ready.
Back to you, Devin.