North Korea must 'match words with concrete actions', says South

South Korea's national security adviser, Chung Eui-Yong, says Donald Trump and Kim Jong-un will meet by May this year for denuclearize talks. He says North Korea's leader indicated he is committed to the issue and would not carry out further nuclear or missile tests. Chung says South Korea, the US and its partners 'stand together in insisting that we not repeat the mistakes of the past and that the pressure will continue until North Korea matches its words with concrete actions'.