U.S. President Donald Trump and North Korean leader Kim Jong Un were set to hold a second day of talks in Hanoi on Thursday — including a scheduled "signing ceremony" — as the two leaders, who once traded barbed insults over Pyongyang's nuclear weapons program, met for the second time in eight months.

Trump was optimistic, saying ahead of a dinner Wednesday night that he foresaw a "very successful" summit as the pair greeted each other at the Sofitel Legend Metropole Hotel in the Vietnamese capital.

The North's state-run Korean Central News Agency also lauded the first day of the summit on Thursday, saying the two leaders had "exchanged serious and in-depth opinions to produce comprehensive and epochal results from the meeting that could live up to the attention and expectations that the world is holding for the success of the summit."