The full text of his speech is as follows:

CTBT basically aims at not allowing the qualitative improvement of the existing nuclear weapons and the development of any new types of nuclear weapons, through banning all sorts of nuclear tests that accompany physical nuclear explosion in the air, outer space and under water and ground.

Accordingly, all governments that have signed this treaty are neither allowed to conduct nuclear tests or other nuclear explosions inside their own countries nor to be involved in any kinds of acts that instigate or encourage such explosions.

In a nutshell, the main objective of this treaty is to fundamentally eliminate any possibilities of nuclear development.

Once this treaty becomes effective and displays its vitality, then there is no doubt that it would make a great contribution to the world peace and stability. However, CTBT still has not come into effect though 16 years has passed after its adoption. Then what could be the reason for that?

It is because the current situation of the nuclear disarmament is too far distant from the treaty's ideal.

The realistic and massive nuclear disarmament is the pre-condition for enforcing the treaty.

But currently, the world-wide nuclear disarmament is not making satisfactory progress due to the disagreements and conflicts in the interests of the main nuclear powers.

In particular, the U.S., which emerged a nuclear superpower after the end of the Cold War with the Soviet Union, is exerting all its efforts to take pre-emptive measures to prevent the appearance of any other nuclear power and to secure the overwhelming superiority in the strategic nuclear armed forces.

For this, the U.S. is initiating nuclear disarmament negotiations in order to weaken the nuclear power of the potential enemies while seeking absolute military and strategic supremacy by enforcing qualitative modernization of its nuclear weapons and building strategic missile defense system.

What is more serious is that the U.S. is enhancing the efficiency of the nuclear weapons without physical nuclear tests by making the ill use of the advanced technology such as sub-critical nuclear testing technologies and thus, deceiving the world public opinion and veiling its sinister intentions.

As the U.S. is pursuing high-handed politics based on the powerful military capability, still seized with the Cold War way of thinking, tensions have become more acute in the world.

It is for this reason that other nuclear powers that do not measure up to the U.S. in the overall military and economic capabilities are giving priority to nuclear weapons in their security policy in order to retain their position by maintaining the basic strategic balance.

In case we avoid the complete elimination of existing nuclear weapons and unilaterally execute CTBT, it would give rise to serious inequality and imbalance in the security of each state and this would rather bring about irretrievable consequences in the global peace and stability.

Up to the end of 2009, the world recorded a total of 2 054 nuclear tests and 99.99 percent of those were carried out by permanent member states of the United Nations Security Council.

The nuclear powers conducted many nuclear tests and built up their nuclear arsenal as much as they could and thus monopolized the nuclear weapons.

Therefore, no more nuclear tests are necessary for them and still, they can exercise their influence as much as they want in the international stage as a nuclear power by depending on their existing nuclear arsenal.

Given this current situation, countries like the DPRK can not but take the issue of signing CTBT seriously because they are placed in special circumstances beyond control where they need to be equipped with self-defensive nuclear deterrent in order to cope with the direct nuclear threats of the U.S., the only nuclear superpower of the world.

The U.S. hostile policy toward the DPRK has been enforced for more than half a century to eliminate the DPRK.

What's more serious is that the U.S. has its national policy of not ruling out the use of nukes in order to stifle the DPRK.

In the "2010 Nuclear Posture Review", the U.S. refused to give the guarantee to nonuse of nuclear weapons against the DPRK and Iran and thus, made a pre-emptive nuclear strike a fait accompli.

In addition to this, the U.S. stages frantic nuclear war exercises against the DPRK every year with massive nuclear strike means in and around the Korean Peninsula.

The constant U.S. hostile policy and threats forced the DPRK to carry out nuclear tests twice and possess nuclear deterrent as part of the self-defensive measures aimed at safeguarding the security and sovereign rights of the country.

Even countries like France and UK that are not directly under the threats of war as being member states of the NATO, regard the nuclear deterrent as a guarantee for ensuring sovereignty and peace. So it is needless to say that the DPRK should take the same approach to defend itself.

Unless the U.S. hostile policy and its nuclear threats are completely withdrawn and a solid and permanent peace regime is in place on the Korean Peninsula, the DPRK is left with no other choice but to steadily strengthen its self-defensive nuclear deterrent to the standard as it deems necessary.

It is so clear that unless the U.S., the nuclear superpower which is allegedly playing a "pivotal role" in the world peace and stability, abandon its plan to seize the military supremacy based on the modernized nuclear weapons and give up its nuclear threats to the anti-imperialist independent countries like the DPRK, the prevention of nuclear weapons development through CTBT would remain a mission impossible.

Only when CTBT is enforced under the pre-condition that the nuclear weapons would be completely removed on a worldwide scale can all states be granted practically equal and just obligations and rights.

In that sense, the more pressing issue than enforcing CTBT is to establish an international legal framework on unconditional ban on the use and complete removal of existing nuclear weapons worldwide and work out impartial and proportionate measures for nuclear disarmament and removal based on mutual trust.

In order to make CTBT effective in the reality, its pre-conditions should be ready and for that, the main nuclear powers should fulfill their responsibility and duty in the efforts to thoroughly remove the source of the nuclear war in the world.

Especially it is important for the U.S., a nuclear superpower of the world, to promptly stop all acts of military buildup that destroy the world stability such as modernizing and conventionalizing nuclear weapons as well as developing new ultra-modern weapons in substitute for nukes.

Unless the U.S. puts an end to these maneuvers, we would never see the folding up of arms race among the great powers aimed at defending their own security and strategic interests and this would produce grave consequences to the world peace and stability.

As repeatedly clarified, the DPRK would discharge its responsibility and duty as a responsible nuclear state for the nuclear non-proliferation in the future.