This fact was disclosed through the huddle between the U.S. deputy secretary of Defense and the "minister of Defense" of south Korea on Monday.

Some days ago, B-52 was busy flying in the air over south Korea in a drill for a preemptive nuclear strike at the DPRK.

The U.S. imperialists are set to let the bomber on stand-by on Guam at a time when the joint military exercises Key Resolve are under way at a full-dress stage make sorties to south Korea and planning its continued flights.

The warmongers are openly threatening the DPRK, claiming that "it is a message of strong warning to the DPRK and they would counter it by force."

In the past the U.S. imperialists used to conduct drills for a preemptive nuclear strike at the DPRK by introducing the strategic bomber quite often. But, it is the first time that they disclosed the aim of its introduction and flight program.

Meanwhile, they asserted that they would give priority to arms reinforcement in south Korea to militarily pressurize the DPRK, and elaborate on the plan for tightening the anti-DPRK "sanctions".