Though Trump claimed "there is no longer a nuclear threat from North Korea" following the Singapore summit, US officials cited by NBC News reported that the country is still covertly producing uranium for nuclear weapons.
Leaked U.S. intelligence findings have concluded that North Korea does not intend to give up its nuclear program completely.
Pyongyang noted that it had already destroyed a nuclear test site - a concession that Trump has already publicly hailed as a victory for peace - and lamented that Pompeo had proved unwilling to match this with U.S. concessions. "If it's not true, then we go back to the other way, but I don't think that's going to be necessary".
There had been criticism on whether the civilian exercises were adequately preparing South Koreans from North Korean threats.
"We talked about what the North Koreans are continuing to do and how it's the case that we can get our arms around achieving what Chairman Kim and President Trump both agreed to, which is the complete denuclearization of North Korea", Pompeo said.
Professor Yang Moo-Jin at the University of North Korean Studies in Seoul said Pyongyang wants to separate "US bureaucrats from President Trump, expressing trust in him".
"This is not the end of the process".
The secretary of state is under pressure to deliver a more concrete disarmament plan after the two leaders signed a vague one and a half page document that didn't provide a timetable for dismantling North Korea's nuclear arsenal.
Thailand cave rescue: Operation underway to bring boys out of cave
Dr Harris , another Australian, a friend of his, and six Australian Federal Police divers are a key part of the rescue team. The boys, ages 11 to 16, and their coach became stranded when they went exploring in the cave after a practice game.
"This is standard operating procedure for three generations now of dictators in North Korea", Sen.
It was "a sacred land of the revolution", Kim said, which authorities were seeking to build "into a model of the country and fairyland of communism". "Nobody should be surprised by foot dragging". He said "there is much work for us to do together and I'm honored to be with you here today".
Republican Senator Lindsey Graham said on Sunday that the setback in talks between the United States and North Korea could be blamed on China.
Following those meetings, Pompeo said the two sides agreed to hold discussions on July 12 on repatriating the remains of USA troops. But following the stinging commentary from the North, he allowed that the goal of denuclearization would be hard and that much work remains.
Skepticism has grown over how and whether North Korea will dismantle its nuclear weapons program amid US media reports that the country has continued to develop nuclear facilities.
It is the first time he has visited North Korea since a summit between Donald Trump and Kim Jong-un in Singapore. It also destroyed its main nuclear testing site, where it conducted its sixth and most powerful underground nuclear explosion in September.
South Korean Foreign Minister Kang Kyung-wha said that North Korea had balked at a written pledge for "complete, verifiable and irreversible denuclearization" for historical reasons but stressed that the goal remained the same whether that exact phrase was used. Speaking to Fox News, Graham said that the ongoing trade war between the United States and China is the major reason for the pushback by Pyongyang.
DPRK is short for Democratic People's Republic of Korea, the North's official title.
"I see China's hands all over this". Last week, Trump's national security adviser John Bolton said North Korea could be expected to carry out the "bulk" of denuclearisation within a year.