Although Mr Trump trumpeted the success of the initial meeting, clear tensions remain between the two sides over the issue of denuclearisation.
Following the Singapore summit, North Korea reaffirmed its commitment to denuclearisation, although little detail was provided as to how long the process might take.
Satellite pictures have since emerged that appear to show one of the country’s rocket sites being dismantled, but there have also been reports that the North is continuing its weapons programme in secret.
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A confidential United Nations report accused North Korea of continuing to develop nuclear and missile programs, while US secretary of state Mike Pompeo admitted last month that the North continues to produce weapons-grade fissile material.
The report said: “It [North Korea] has not stopped its nuclear and missile programmes and continued to defy Security Council resolutions through a massive increase in illicit ship-to-ship transfers of petroleum products, as well as through transfers of coal at sea during 2018.”
North Korea is yet to respond to the report’s findings.
Despite the UN’s findings, US Secretary of State Mike Pompeo has claimed to be ‘optimistic’ about the progress of denuclearisation, although he admitted that the process would ‘take some time’.
Mr Pomeo said: ‘”The work has begun. The process of achieving denuclearisation of the peninsula is one that I think we have all known would take some time.”