Shortly ago, the U.S. president let loose a spate of invectives falsifying truth, talking about "provocation" and "threat" from the DPRK in a bid to give a shot in the arm of the chief executive of south Korea during her visit to her master.

The recently escalated confrontation between the DPRK and the U.S. was sparked off by its high-handed hostile act of pulling up the former over its satellite launch for peaceful purposes.

The DPRK just took minimum countermeasures for self-defence to protect its sovereignty and security in order to cope with the U.S. escalating hostile actions.

The U.S. let B-52, B-2A, F-22 and all other air nuclear strike means make open sorties into the air over the peninsula for the first time in history, posing the biggest-ever nuclear threat to the DPRK. This compelled Pyongyang to take tough countermeasures for self-defence and pushed the situation in Korea to the brink of war.

There is world public opinion that the situation on the peninsula has shown a sign of detente since the U.S.-south Korea joint military exercises were over. This goes to prove that the U.S. hostile policy and military threat to the DPRK are the root cause of the tension.

After escalating the tension on the peninsula, the U.S. is talking a lot about the updating of security alliance, re-confirmation of defense commitments, establishment of joint missile defense system and investment in it. Lurking behind this is a sinister intention to push ahead with its pivot-to-Asia-Pacific strategy.

The U.S. claim that all its military actions are "defensive" whereas all actions of the DPRK are "provocative" is more sheer sophism than Washington's propaganda made in the 1950s and the 1960s that the "Reds" had horns on their heads.

No matter how hard the U.S. president tries to cover up his sophism with rhetoric, he can neither change it into truth nor pull the wool over the eyes of the awakened people of the world.

The root cause of tension will not be removed but the tension and danger of conflicts are bound to repeat themselves unless the U.S. stops its hostile acts against the DPRK and drops its hostility towards it.

The U.S. president would be well advised not to talk about "change" in the DPRK but reflect on his own wrong view in good time and make a bold decision to correct it at least.