A planned signing ceremony between President Trump and Kim Jong Un capping the summit was scrapped Thursday in Vietnam, with no agreement reached and talks ending about an hour and a half early.

This led to a conference from President Trump, during which he called the meeting a "very productive time." He said there were options, but that the US "decided not to do any of the options," and that sometimes, the US "has to walk."

Secretary of State Mike Pompeo also talked of progress, but said it "didn't make sense for the United States." He claimed to be optimistic for a "really good outcome" in the future, adding that meant total denuclearization of North Korea.

Trump said all North Korea sanctions will remain in place, and confirmed to reporters that this was the sticking point. He said Kim had "wanted sanctions lifted but weren't willing to give us the areas we wanted." He added North Korea would ultimately give in "at a certain point in time."