South Koreans head to the polls after months of turmoil

A declaration of martial law. Impeachment. Months of protest and deep political divisions. That's what South Korea has been through over the last six months. Tomorrow, the country will vote for a new president. There's one clear frontrunner. But the political divide - along with big economic and security challenges - will remain, no matter who wins this election. The World's Matthew Bell has the story.