History offers parallels that sound a note of caution.
The vice president commended Trump on his success thus far with North Korea, speaking of that country's participation in the Winter Olympics, the suspension of all ballistic missile testing and, recently, the release of three American hostages.
The Chicago Council on Global Affairs, in partnership with AP-GfK, conducts a regular survey on foreign policy that includes a series of questions about what actions Americans support or oppose the USA taking to pressure North Korea to stop building its nuclear weapons program.
"China has consistently held that sanctions are not the goal in themselves", Geng said at a daily briefing.
He praised Trump and Kim for their "courage and determination" not to settle for "that outdated and familiar reality but to take a daring step towards change".
He had been imprisoned in North Korea beginning in January 2016 after being sentenced to 15 years of hard labor for trying to steal a poster bearing a propaganda slogan from his hotel, North Korea state media said. When asked if he was tortured, she said she can't be sure what caused the lack of oxygen to the brain.
'He wants to do the right thing, ' he said of Kim.
According to the Defense Department's POW/MIA Accounting Agency, more than 7,800 Americans have not been accounted for from the war, and about 5,300 of that total are believed to have been lost in battle in North Korea or buried at prisoner-of-war camps. "I think we just need to continue to be concerned about whether or not North Korea is going to stand by its word".
'We are trying to build a pathway that leads directly to Kim and his regime to force them to be answerable for their actions, ' Mr. Warmbier said. "I got that after we signed the agreement", the president told reporters.
He was the first leader to get the United States president to meet with him and he can bring back this great victory to his country and focus on what he says his priority now, which is the shift from the nuclear weapons development to improving the North Korean economy. How can I not? It embarrasses them. They don't like the world to think that they aren't trying to be a member of the world, and they like to act like a victim, like they've been treated poorly, ' she said.