North Korean leader Kim Jong Un's brother, Kim Yo Jong, deputy chairman of the Workers' Party of Korea, has poured out his last words to the ROK and U.S. leaders in opposition to the adoption of the "Washington Declaration," which contains measures to strengthen extended deterrence.

In a statement issued today (29 May) through the Korean Central News Agency, Deputy Chairman Kim characterized the "Washington Declaration" as "the aggregated product of the heinous hostile policy toward North Korea that reflects the most hostile and aggressive will to act."

He condemned the act as "unwelcome as it would result in exposing the peace and security of the Northeast Asian region and the world to more grave risks."

Kim Yo Jong also directly criticized the U.S. and South Korean leaders.

Earlier, U.S. President Joe Biden warned at a joint press conference after the U.S.-ROK summit that a nuclear attack by North Korea would "lead to the end of the regime."

In response, Deputy Chairman Kim said, "Another fact that cannot be counted and cannot be ignored is that the Commander-in-Chief of the enemy country openly and directly used the expression 'the end of the regime' in the eyes of the whole world."

He continued, "I can't be responsible for the safety and future of the United States at all, and even if I only take the remaining two years of my term, I can say that it is an old man's delusion that he has no future to burden."

Turning to President Yun, he accused him of "being an ugly human being who senses the empty shell declaration from the United States," adding, "It remains to be seen how far Yoon Seok-yeol goes with his incompetence to put security on the chopping block."

"The delusions of the United States and South Korea will face the reality of a more powerful force in the future," he said, "and we have reaffirmed our conviction that we must be more perfect in the second task of enhancing deterrence of nuclear war and, in particular, deterrence."

This suggests that North Korea's nuclear force is intended to deter an adversary from attack, but it can also be used for other missions, such as a preemptive strike.