Experts downplay effectiveness of charm offensive and say even if Trump might want to engage Iran the same way he has North Korea, Tehran is not interested

US president invites North Korean leader to visit him in Washington, but tells media that 'speed is not the object' in reaching a denuclearization agreement

First time a sitting US president has set foot in the country, marking a return to face-to-face contact between the leaders since talks broke down in February

US president says he expects meeting at heavily fortified frontier to be very short: 'Virtually a handshake, but that's OK. A handshake means a lot'

Highly unusual meeting at heavily fortified frontier being worked on, president says from Seoul, in latest display of unconventional diplomacy with dictator

'I just thought of it this morning,' US president says of his Twitter invitation; Pyongyang calls offer a 'very interesting suggestion'

Kim Yong Chol, who was reportedly sentenced to hard labor over failed nuclear summit with US, filmed enjoying a concert near leader Kim Jong Un

US president forgoes custom of avoiding partisan attacks while abroad to call Democratic candidate Joe Biden a 'low IQ individual'

US president says Pyongyang 'fired off some small weapons, which disturbed some of my people, and others, but not me'

After US presidential hopeful calls regime leader a 'tyrant,' Pyongyang retorts that he's an 'imbecile bereft of elementary quality as a human being'