North Korea blamed botulism and ingestion of a sleeping pill and dismissed torture claims.
"It is a list of aspirational goals", said Evans Revere, a former United States negotiator with North Korea.
Trump and Vice President Mike Pence attempted to clarify Bolton's comments in May, but Pyongyang was back on the offensive: North Korea's state-run media outlet referred to Pence as "ignorant and stupid" for making "unbridled and impudent remarks". "We will be there together with North Korea along the way", Moon said in a statement.
"My whole life has been deals. I will call him shortly - maybe before I land", Trump said.
"I really think that Otto is someone who did not die in vain".
This was seen by some analysts as a big victory for China, since Beijing had sought a "dual suspension" - or "freeze for freeze" - by which the USA and South Korea would freeze military exercises in exchange for the North suspending nuclear weapons testing.
Trump and Kim met privately from 9:05am local time for 48 minutes flanked only by their translators, then broke for a wider bilateral meeting with aides, a meeting expected to last 90 minutes, leading into lunch at 11:30am (3:30 GMT).
Panetta pointed to previous US administrations that tried to negotiate with Pyongyang, but failed to make the deals stick.
Earlier, discussions took place on the possibility of President Moon Jae-in joining Kim and Trump in Singapore for follow-up talks on ending the war, but Moon was not invited.
"Now would not be the time to ease global sanctions against North Korea".
Multi-state salmonella outbreak linked to pre-cut melon sickens 60 people
The individuals who became ill said they ate pre-cut cantaloupe, watermelon or a fruit salad mix that contained melon. So far, 60 people infected with the outbreak strain have been reported in five states, including 32 cases in MI .
I said, 'Do me a favor; we've got this missile-engine testing site. The talks ultimately imploded over differences on a verification regime, and North Korea formally withdrew from the negotiations after it launched a long-range rocket, prompting worldwide outrage.
U.S. Senator Rob Portman of OH said on Tuesday that the day he joined Warmbier's parents to welcome their son home almost a year ago "is a constant reminder to me about the evil nature of this regime".
"The Chinese side believes that ... the actions taken by the UN Security Council should support the current diplomatic dialogues and efforts in progressing towards denuclearisation of the Korean peninsula", he added.
The Trump-Kim summit, unthinkable just a few months ago, is yet more vindication of the Cold War doctrine of deterrence where the capacity and threat to inflict pain augments the force of diplomacy, and can prompt "rogue" regimes to display a strong survival instinct.
The first ever meeting between a sitting USA president and a North Korean leader marked a de facto recognition of the North Korean regime.
He emphasized, however, that the Trump administration is still working toward a final deal.
Critics of the joint statement say the United States walked into a trap that will spell the end of the "maximum pressure" campaign created to isolate and extract concessions from Pyongyang.
"To complete the process, the honest efforts of South Korea, North Korea and the U.S.as well as continuous cooperation by neighboring countries are necessary", Moon added.
"This hollow, nonbinding joint statement allows Trump to walk away from it, because there's nothing to walk away from", said Lee.
But Lee said the brittleness of the agreement might make it easy for Trump to abandon. "The question is, will Trump have the fortitude to admit he was duped?"