South Korean marines wave national flags to mark the second anniversary of North Korea’s artillery attack on the Yeonpyeong island at a ceremony in Seoul. Photo: AP

South Korea's Ministry of Patriots and Veterans Affairs mark the shelling on Yeonpyeong island outside the War Memorial of Korea in Seoul. Photo: AP

South Korean veterans and conservative civic groups attend the memorial of the second anniversary for victims of the artillery attack on Yeonpyeong Island in Seoul in South Korea. Photo: Xinhua