The pair arrived in Vietnam with hopes of building on last year's historic summit in Singapore. However, less than two days later, they signed no agreement, and it's unclear when they'll talk again.
North Korea's neighbours South Korea and China both said they were disappointed with the outcome. So what went wrong? And where does it leave the nuclear threat from North Korea?
Presenter: Hoda Abdel-Hamid | Guests: Se-Woong Koo - Publisher, Korea Expose; Robert Gutsche - Associate Professor at Lancaster University; Emil Dall - Research Fellow at the Royal United Services Institute and Specialist on Nuclear Proliferation
