North Korea did not take kindly to the content of Pompeo's visit, which covered what the USA definition of denuclearization is and what would be needed for sanctions relief.
In this June 12, 2018, file photo, North Korea leader Kim Jong Un, left, and U.S. President Donald Trump shake hands at the conclusion of their meetings at the Capella resort on Sentosa Island in Singapore.
"A very nice note from Chairman Kim of North Korea", Trump said.
Foreign ministry spokesman Noh Kyu-duk said, "The government hopes the agreements reached between leaders at the North Korea-U.S. summit, including the repatriation of Korean War remains, will be swiftly carried out as a means to fulfill the objective of complete denuclearization and establishment of a peace system on the Korean Peninsula".
Meanwhile, the Pentagon put a dollar amount - about US$14 million - on the costs of Freedom Guardian, which was shelved after Trump met with Kim in a historic summit Singapore last month. "They didn't show." The newspaper identifies the negotiators waiting for the North Koreans as "Department of Defense and United Nations Command" officials. But the North Korean leader never showed up during Pompeo's three-day visit.
American officials have been on standby for weeks and have sent wooden coffins and flags to Panmunjom in preparation for a handover.
Both sides were expected to discuss the timeline and ways in which remains of American soldiers would be returned at the meeting.
North Korea also proposed to reschedule the meeting for Sunday.
Byrd, a forensic anthropologist, was part of a 15-strong DPAA team in North Korea 20 years ago.
In the letter dated July 6, Kim thanked Trump for his "energetic and extraordinary efforts" to improve the once hostile relations between the two countries.
That number includes 7,702 who are missing in action, with an estimated 5,300 believed to have been lost in the North, according to the Hawaii-based DPAA, which oversees the effort. He also told supporters in Nevada that North Korea had already handed over 200 sets of remains.
"North Korea would have to deal with the consequences of breaking away from the negotiations if it were to do so, so it will likely not make an extreme decision", Kim said.