South Korean foreign minister Kang Kyung-wha,... who's in Davos for the World Economic Forum,.. is urging North Korea to make concrete pledges on denuclearization during the next Pyeongyang-Washington summit.<br />Kang said such pledges include dismantling its main nuclear complex and allowing international inspections to confirm the process.<br />Speaking to Reuters,... Kang said she's optimistic North Korea will agree to concrete steps towards the scrapping of their nuclear and ballistic missile programs.<br />She added the North's economy will never improve unless such steps are taken. <br />