US President Donald Trump and North Korean leader Kim Jong-un are poised to meet for an unprecedented summit on Tuesday aimed at defusing tensions on the Korean peninsula.
No sitting US president has ever met a North Korean leader.
Mr Trump has said the highly anticipated talks represent a "one-time shot" at peace.
The meeting marks a dramatic shift in relations between the pair, who last year traded insults and threats of war.
Washington hopes the summit will kick-start a process that eventually leads to the denuclearisation of North Korea, although what that actually means is likely to be contested.
