We are paying attention again to the U.S. attitude before and after the south-north high-level contact on Feb. 14, the letter said.

The U.S. fostered the atmosphere of a war through the north-targeted nuclear strike drill by introducing a formation of B-52s in the sky above Jik Islet in the West Sea of Korea at the time when the south and the north were reaching an agreement on reunion of separated families and relatives, it charged, adding this is a very open racket to foil south-north talks.

The Key Resolve and Foal Eagle joint military exercises kicked off by the U.S. with the south Korean authorities deliberately tarnished the atmosphere of the hard-won reunion of separated families and relatives.

The U.S. irritated the north with extreme expression and deliberately escalated tensions on the Korean peninsula, throwing a wet blanket over the atmosphere of mending the south-north relations.

The military exercises kicked off by the U.S. after introducing nuclear submarine, Aegis destroyers and other huge nuclear war means in the East, West and South Seas of Korea go to clearly prove that the U.S. schemes to ignite a war on the Korean peninsula at any cost.

The U.S. is threatening the existence of the south Korean people in order to meet its interests.

The real picture of the U.S. policy for foiling the improvement of south-north relations and its threat of a nuclear war has been proved objectively.