Rodong Sinmun Friday asserts this in an article.

It goes on:

The on-going nuclear war drills against the DPRK are adventurous moves that accelerate the self-destruction of the U.S. and south Korean puppet group of traitors as they are too much obsessed with megalomania to find a way-out. The warmongers at home and abroad talk volumes about "pressure upon the north" and "beheading operation", being oblivious of the lesson drawn from their defeat in the Korean War. This is nothing but a ridiculous behavior of repeating the history of shameful defeat.

It is not the 1950s now and gone are the days when the U.S. used to threaten and blackmail the DPRK with nuclear weapons.

The DPRK, which beat back the U.S. imperialist aggressors who boasted of being the "strongest in the world" in the Korean war, a rifle-to-A-bomb showdown, has now had access to powerful nuclear deterrent.

The DPRK gets firm in its will to achieve a final victory in the long confrontation with the U.S. by bolstering up the nuclear deterrent for self-defense now that the U.S. imperialists and south Korean puppet regime get more vicious in provocation.

The warmongers should not act rashly.