On the day their talks in Hanoi collapsed last month, US President Donald Trump handed North Korean leader Kim Jong Un a piece of paper that included a blunt call for the transfer of Pyongyang’s nuclear weapons and bomb fuel to the United States, according to a document seen by Reuters news agency.

Trump gave Kim both Korean and English-language versions of the US position at Hanoi’s Metropole hotel on February 28, according to a source familiar with the discussions, speaking on condition of anonymity. It was the first time that Trump himself had explicitly defined what he meant by denuclearisation directly to Kim, the source said.

A joint lunch for the two leaders was cancelled the same day. While neither side has presented a complete account of why the summit collapsed, the document may help explain it.

The document’s existence was first mentioned by NSA John Bolton in television interviews he gave after the two-day summit. Bolton did not disclose in those interviews the pivotal US expectation contained in the document that North Korea should transfer its nuclear weapons and fissile material to the US.

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