US President Donald Trump and North Korean leader Kim Jong-Un have both arrived in Singapore ahead of their historic summit tomorrow.
The meeting is a first between a leader from North Korea and a sitting US president.
The US remains hopeful the meeting could see North Korea start a process to rid itself of its nuclear missile program.
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Mr Trump has called the meeting a “one-time shot” and said he will know “within the first minute” whether an agreement will happen.
“If I think it won’t happen, I’m not going to waste my time,” he said.
Former US ambassador to the UN Susan Rice said attempts to negotiate could be fruitless.
“The problem is at every turn the North Koreans make commitments, then break them. We need to be mindful that is again what might happen,” she said.