The study of the policy pursued by the Obama administration for the past 100 days since its emergence made it clear that the U.S. hostile policy toward the DPRK remains unchanged.

It is the essence of the U.S. persistent hostile policy toward the DPRK to eliminate the ideology and bring down the system, both chosen by its people.

The present U.S. president called for "proper punishment", describing the DPRK's launch of satellite for peaceful purposes as "a challenge" and "provocation" while the secretary of State is repeating such malignant vituperation let loose by the preceding government as slandering the system in the DPRK as a "tyrannical" and "rogue regime" and the like.

The attitude of the present U.S. administration is not confined to those outbursts. No sooner had the Obama administration emerged than busied itself staging the largest-ever Key Resolve and Foal Eagle joint military exercises in and around south Korea in March, seriously threatening the security of the DPRK.

The U.S. referred the issue of the DPRK's launch of satellite for peaceful purposes to the UNSC and thus made it apply sanctions against it in a bid to physically stifle its national defence industry.

Nothing would be expected from the U.S. which remains unchanged in its hostility toward its dialogue partner.

The measures taken by the DPRK recently to bolster its national defence capability are aimed not to draw attention of someone and have dialogue with it but to defend the security of the country and the sovereignty of the nation.

The DPRK will bolster its nuclear deterrent as it has already clarified.