Trump wrote, claiming that television networks "are fighting hard to downplay the deal with North Korea". The president had announced a halt in the drills after his meeting with Kim on Tuesday.
Kim, in return, agreed to work toward a vague "complete denuclearization of the Korean Peninsula".
Sen. Bob Corker, R-Tenn., said Tuesday that he wants Secretary of State Mike Pompeo to brief senators on the substance of what the two nations discussed, including whether USA troops stationed on the Korean Peninsula would remain.
The document also refers to the repatriation of the remains of prisoners of war and those killed in conflict, but makes no specific reference to people abducted by North Korea.
Bermudez said the stand was North Korea's only known facility used for land-based and canister-launched missile ejection tests that were critical for developing the solid-fuel Pukguksong-2 missiles.
Kim Jong-un and Donald Trump are sitting side by side.
"High expectations were met by low results", said Nam Sung-wook, a North Korea expert at Seoul's Korea University.
As Trump acknowledged that denuclearisation would not be accomplished overnight, the North suggested Wednesday that Trump had moved away from his demand for complete denuclearization before US sanctions on the long-isolated country are removed.
Several U.S. lawmakers expressed their approval of Trump's meeting with Kim, but said they were skeptical of the U.S. leader's declaration that North Korea no longer poses a nuclear threat.
Trump responded to such commentary on Twitter, saying: "The fact that I am having a meeting is a major loss for the USA, say the haters & losers". The hostages are back home with their families.
Chinese state media described the summit as a "starting point" but said "no-one would expect the half-day summit to be able to iron out all differences and remove deep-seated mistrust between the two long-time foes". Previous year it tested long-range missiles that could reach the US mainland, although it remains unclear if it has mastered the technology to deliver a nuclear warhead that could re-enter the atmosphere and hit its target.
Ms Hanham also said the USA and North Korea "still don't agree on what "de-nuclearisation" means". "The sanctions will come off when we are sure that the nukes are no longer a factor", Trump later told reporters in Singapore. -South Korea military exercises. -South Korean military drills and move forward with the plan to remove the 28,500 American troops stationed in Seoul. It was Trump's unique and maverick approach to the North Korean problem, they argue, that yielded results nobody anticipated.
Pompeo also said Trump had been "unambiguous" in his conversations with Kim regarding the suspension of joint U.S. "We paid for a big majority of them".
"He was unambiguous about that and how he communicated it, both at the press conference but certainly when he was with Chairman Kim as well", Pompeo said.
Trump said he had formed a "very special bond" with Kim and that relationship with North Korea would be very different. And Secretary of State Mike Pompeo sought to keep expectations for the summit in check. Pompeo was slated to fly on to Beijing later Thursday.
He would not say whether that included the possibility of withdrawing US troops from the Korean Peninsula, but said the context of the discussions was "radically different than ever before".
South Korean Minister of Defence, Itsunori Onodera, said: "We would like to seek an understanding of this between Japan, the United States and South Korea". The next scheduled major joint South Korean exercise, which typically involves tens of thousands of troops, is normally held in August.