North Korean leader Kim Jong Un and US President Donald Trump arrived in Hanoi Tuesday, ahead of a second summit closely watched for concrete steps to dismantle Pyongyang's nuclear programme.
After an initial historic meeting in Singapore in June that produced only a vague statement about denuclearisation, analysts say the second date must deliver more in the way of tangible progress.
The summit itself is shrouded in secrecy and there was still no official word even on the venue when Trump touched down in Air Force One late Tuesday. The two leaders were expected to have an informal dinner on Wednesday before more formal talks on Thursday.
Trump made no comment to reporters on his aircraft but had previously tweeted his hopes for a "very productive" meeting, reiterating that North Korea could enjoy economic riches if it gave up its nuclear weapons. "With complete Denuclearization, North Korea will rapidly become an Economic Powerhouse," tweeted Trump.