Pyongyang, August 13 (KCNA) -- Recently, the secretaries of State and Defense and the national security advisor of the White House - top diplomacy and security brass of the Biden Administration in the U.S. - jointly contributed an article to their media. In the article, they defined the "nuclear threat" of the DPRK as a crucial "security challenge" in the Indo-Pacific region and advertised the U.S.-Japan-ROK tightened tripartite security cooperation targeting the DPRK as an important "achievement" in carrying out the foreign policy of their government. What is the purpose of the present U.S. administration to hold fast to its anti-DPRK policy on the verge of bankruptcy and advertise for its achievement even at a time when it is preparing for its retirement? The DPRK's "nuclear threat", touted by the U.S., is an inevitable result of the former's deep-rooted hostile policy toward the former that has lasted decades after decades and generation after generation. As recognized by the international community, it is the U.S. that compelled the DPRK to have access to nuclear weapons and it is none other than the successive U.S. administrations that have pushed the DPRK into bolstering up its nuclear war deterrence. The outbursts that declared the "end of regime" in the DPRK were uttered by the top executive of the enemy state, and the "declaration of a nuclear war" and the "nuclear operation guidelines" targeting the DPRK, too, are all cooked up and implemented by the U.S. No one can remain a passive onlooker to the robber who broke into one's house with a knife. The DPRK's bolstering of its self-defence capabilities is the legitimate duty and right of a sovereign state to defend its national security, deter war and protect its people's life and future from the U.S. ever-increasing military threats and the regional security concern arousing therefrom. As the U.S. persists in its moves to stifle the DPRK to the worst-ever level, the DPRK's absolute might will be rapidly bolstered up as a conditioned reflex and the level of security threat to the enemies will be directly proportional to it. This has now become a law. In the final analysis, the U.S. persistent hostile policy toward the DPRK has not relieved the U.S. of "security crisis" and "security uneasiness", but rather produced a contrary result of increasing them. And as far as the biggest "achievement" of the present Biden clique is concerned, it only made the U.S., whose security was in an unsafe situation, a "fixed target" easy to aim during its office. The strengthened tripartite security cooperation trumpeted by the U.S. has only made the peoples of Japan and the puppet ROK cannon fodder of nuclear war, rather than giving benefits to the two stooges. What the stooges got through the tripartite security cooperation are such strong protests of the peoples in their countries as "security dilemma", "Is Japan really a sovereign state?" and "We oppose the U.S.-Japan-ROK war alliance disturbing peace!" and a debt document called huge "security dividend" granted by their master. Moreover, the reckless expansion of the military bloc system based on the U.S. nuclear weapons that wrecks the balance of force in the region is bound to invite strong counteraction of independent states possessed of nuclear weapons. Whether the recent childish article of the U.S. rulers is aimed to inspire the stooges trembling before the super-strength of the armed forces of the DPRK or to calm down the accusations and condemnations to be flooded with after their retirement with "calculated boasting of administrative achievements", it doesn't hold any water and will only show the miserable appearance of the "superpower" on the downgrade. The strength of the DPRK will continue to evolve and the supremacy of the power of its armed forces will know no limits. The U.S. should always remember that it could live in peace and calm only when we live in peace and comfort.