The U.S. State Department says the U.S. special envoy for North Korea,... Stephen Biegun left for Hanoi on Tuesday,... to prepare for next week's summit between the two countries' leaders.<br />This comes as North Korea's Special Representative for U.S. Affairs, Kim Hyok-chol, is also on his way to the Vietnamese capital.<br />The working-level North Korean official and his delegates are reportedly in Beijing for a stop-over. <br />Kim Hyok-chol is joined by Choe Kang-il, North Korea's Deputy Director-General for North American affairs and Kim Song-hye, head of North Korea's United Front Department.<br />The two sides are expected to discuss what concrete denuclearization steps the North is willing to take,... and what the U.S. will offer in return.<br />They will also discuss the logistics and protocol of the summit. <br />
