. >>> south koreans on friday marked the second anniversary of north korea's shelling0gz of yeonpyeong island that killed four people. a ceremony to remember the two soldiers and two civilians was held on the island in the yellow sea. nhk world has more. >> reporter: about 100 people took part in the ceremony with many offering flowers at a monument dedicated to the fallen. the shelling bombed 40 houses. it's been two years since the island came under a shelling attack. the south korean government decided to permanently preserve these three houses that were directly hit. it also built a museum where people can learn about the incident. an exhibit displays photographs of shells and footage of the attack to coincide with the anniversary. >> translator: i didn't suffer any direct damage, but the memories of the attack still haunt me. >> translator: north korean officials had threatened it would attack the island again with if the south went ahead with the memorial services. the south korean military staged a drill at the exact hour when the island was bombed in a show of defips and to pre