US
Analysts say a full peace treaty poses many complications, and will need extensive negotiations
US president said he would meet the North Korean leader on February 27 and 28 in Vietnam
After branding them "naive" and in need of schooling the day before
After the White House says Trump will again meet Kim near the end of February
Kim Yong Chol arrived in Washington on Thursday evening for his first visit since he came last June
US president blasts Iran for developing missile technology
Also criticises lack of progress in denuclearisation of Korean Peninsula and China’s “unfair” trade practices
Trade sanctions seek to cut off North's access to hard currency by banning its main exports
Kim renewed his resolve to meet Trump again during his meeting with Chinese President Xi Jinping
The visit coincides with what South Korean officials say is Kim’s 35th birthday on Tuesday