However, relations between the U.S. and North Korea began to cool down as the second U.S.-North Korea summit in Hanoi, Vietnam, broke down in February due to the failure of the two sides to reach an agreement.
그러나 올 2월 베트남 하노이에서 열린 2차 북미정상회담이 양측의 합의 실패로 결렬되면서 북미관계가 냉각되기 시작했다.