South Korean schools offer survival swimming lessons in wake of Sewol tragedy

South Korea marks the 10th anniversary of its worst maritime disaster today. On April 16, 2014, the Sewol ferry capsized en route from Incheon to Jeju Island. Out of 476 people on board, 304 died, mostly students on a school trip. Its sinking remains fresh in the minds of many in South Korea, which has taken steps to ensure such a tragedy never happens again. CNA's Lim Yun Suk has more.