aka "Another North Korean Monkey Wrench"

Once North Korea had missiles that could hit the United States they are NOT going to give that up.  It was their primary goal.

"North Korea casts doubt on Kim-Trump summit, rejects total disarmament" PBS NewsHour 5/16/2018

Excerpt

SUMMARY:  North Korea upset months of thawing relations on Wednesday by threatening to cancel the June summit with President Trump if the U.S. continues to push Pyongyang to abandon its nuclear weapons.  Judy Woodruff reports on the response from the White House.

"Why North Korea is threatening to pull out of the U.S. summit" PBS NewsHour 5/16/2018

Excerpt

SUMMARY:  What seemed like a sure thing a week ago in now up in the air.  A top North Korean official released a statement saying that they are not interested if the U.S. insists on complete nuclear disarmament.  Judy Woodruff talks with former State Department official Joel Wit about the recent back and forth and the prospects for productive talks.