According to the white paper, the U.S. introduction of nuclear weapons into south Korea had already begun in 1950 when it provoked the Korean war.

The U.S. shipped nukes into south Korea and attempted to use them in August, 1950. At the end of the year, it openly revealed its sinister plan to drop 30 to 50 A-bombs on the area near the DPRK-China border.

The U.S. unilaterally scrapped the paragraph 13 d of the Armistice Agreement banning the introduction of all war hardware into Korea from abroad in June, 1957. It declared the nuclear weaponization of the U.S. forces present in south Korea in July. From January, 1958 it brought Honest John nuclear missiles, 280 mm atomic artillery pieces, B-61 nuclear bombs, etc. to south Korea.

In the 1960s it reorganized its pentomic division for nuclear war operations into a modern one and introduced various type nuclear and guided weapons including Matador and Hawk guided missiles and nuclear mines.

In the 1970s the U.S., asserting "the security of south Korea is directly linked with the one of the U.S.", deployed a lot of nuclear strike means in south Korea including nuclear shells and warheads, Lance missiles and nuclear-capable fighter bombers.

In the 1980s the U.S., trumpeting about its "supremacy of power", deployed nuclear backpacks for special ops units, medium and special nuclear bombs capable of destroying bridges, tunnels, roads, etc. in its military bases. It even brought to south Korea tactical nuclear weapons that had been deployed in Okinawa.

It provided its troops in south Korea with nuclear shells for 155 mm howitzers that had never been deployed in any other overseas military bases. It deployed in south Korea even neutron bombs and medium-range Pershing-2 nuclear missiles.

The nuclear weapons shipped by it to south Korea numbered at least 1 720 till the mid-1980s.

This, in the light of the density of nukes deployment, quadrupled the one in the then NATO region. This means more than one nuclear weapon per 100 square kilometers of the territory of south Korea.

South Korea has turned into the world's biggest nuclear arsenal.

The U.S. was fully prepared to ignite a nuclear war any time, systematically introducing nukes in south Korea, having nuclear depots in various places and operating in south Korea even a unit specializing in stockpiling nukes and providing necessary equipment.

Its nuclear war moves continued even after the conclusion of the international treaty banning the introduction of nukes into non-nuclear states and regions.

The U.S. imperialists, in the wake of releasing a deceptive report on the complete withdrawal of tactical nukes from south Korea in July, 1992, announced its "NCND policy" and continued introducing nukes into south Korea.

It was disclosed by the "map on present situation of transport and deployment of nukes of the U.S. forces in south Korea" submitted to the south Korean puppet National Assembly on Oct. 9, 2005 that nukes are deployed in major cities of south Korea including Seoul, Taejon, Pusan, Taegu, Kwangju, Chunchon of south Korean Kangwon Province and Osan of Kyonggi Province.

It was also revealed that there is an 8-km underground nuclear depot in the Kunsan U.S. air force base and 2.74 million depleted uranium bullets are stored at U.S. bases including those in Suwon and Osan of Kyonggi Province and Chongju of North Chungchong Province.

A confidential document of the U.S. forces that was opened to public in December, 2010 made it clear that nukes were being stored at the U.S. military base in Chunchon in April, 2005 and drills were being staged there to use them in contingency.

At the 38th U.S.-south Korea annual security consultative council meeting held in October, 2006 the U.S. made it a fait accompli to deploy not only tactical nuclear weapons but also strategic ones in south Korea to cope with contingency on the Korean peninsula.

According to it, the U.S. openly shipped various type nuclear war hardware including B-52s, B-2s, nuclear submarines and Tomahawk missiles that are called "three nuclear pillars" into south Korea every year.

Citing concrete facts to prove that the U.S. has made nuclear blackmail and threat to the DPRK for decades since the 1950s, the white paper continued:

Since the U.S. started shipping nukes into south Korea, the DPRK has made every possible effort to realize the denuclearization of the Korean peninsula.

As regards the U.S. massive introduction of nukes into south Korea towards the end of the 1950s, the DPRK repeatedly clarified its stand of opposing it at the sessions of the Supreme People's Assembly and the meetings of the Military Armistice Commission and strongly urged the former to stop at once escalating the tension on the Korean peninsula.

In 1959 the DPRK initiated the establishment of peace zone free from nukes in Asia as part of the efforts to realize the denuclearization of the Korean peninsula.

It proposed a plan to turn Northeast Asia into a nuclear free zone in 1981, the three-party talks involving it, the U.S. and south Korea in January, 1984 to completely defuse the danger of a nuclear war and a plan of turning the Korean peninsula into a nuclear free zone in 1986 and made positive efforts to realize them.

It acceded to the NPT in December, 1985, prompted by its purpose to defuse the U.S. nuclear threat and convert the peninsula into a nuclear free zone.

The DPRK issued a government statement in June, 1986 in which it solemnly clarified its stand that it would neither test, produce, store and introduce nukes nor allow outsiders to set up any type military base including nuclear base and that it is opposed to passage of foreign nukes through its territorial land, air and waters.

In July, 1987 its government released a statement urging the north and the south to reduce their troops on a phase-by-phase basis and demanding the U.S. withdraw all forces including nuclear weapons from south Korea and dismantle its military bases there. As part of its practical measure for it, the DPRK unilaterally discharged a hundred thousand troops from military service by the end of that year.

In 1992 a north-south joint declaration on the denuclearization of the Korean peninsula was adopted and took effect while an agreement was adopted by the north and the south upon forming and operating a joint commission for controlling nukes.

As a guarantee for the promise the U.S. made to stop its Team Spirit nuclear war drills, the DPRK allowed the International Atomic Energy Agency to conduct ad hoc inspections of its nuclear facilities six times from May, 1992 to February, 1993.

But the U.S. openly challenged to the DPRK's efforts for denuclearization, asserting "a nuclear free zone is not fit for Asia-Pacific."

However, thanks to the tireless efforts of the DPRK, the six-party talks opened in August, 2003 and the September 19 joint statement was adopted in 2005. But before the ink got dry on the agreement of the six-party talks, the Bush administration cooked up a story about "forged notes," totally denying its implementation.

Also after the Feb. 13 agreement was made at the six-party talks in February, 2007, the U.S. raised the issue of verification of report on the nuclear activities, scuttling the efforts for denuclearization of the Korean peninsula. The six-party talks thus collapsed in December, 2008.

Given that even international treaties and organizations and multilateral agreements could not hold in check the U.S. high-handed and arbitrary practices and rampage but were being abused as levers for justifying them, the DPRK was compelled to take the road of having access to nukes for self-defence to protect the dignity and security of the nation from the nuclear blackmail and threat of the U.S.

Its access to nukes put an end to the nuclear imbalance on the Korean peninsula and provided a strong guarantee for checking and foiling the U.S. attempt to ignite a nuclear war.

But for the DPRK's nuclear deterrent for self-defence, a nuclear war might have broken out on the Korean peninsula many times.

The reality goes to prove how just the DPRK was when it had access to nuclear deterrent for self-defence, while tightening its belt.

Gone are the days never to return when the U.S. had resorted to high-handed and arbitrary practices, brandishing its nuclear weapons. What remains to be done now is to force it to pay dearly for the crimes it committed by bringing nukes to south Korea and posing constant nuclear threat to the DPRK.

The U.S. should stop at once its Key Resolve and Foal Eagle and withdraw its forces of aggression including nuclear weapons from south Korea, well aware that it will only face the final ruin for its reckless nuclear war moves.