North Korean leader Kim Jong Un took his daughter to another missile test on Sunday aimed at “simulating a nuclear attack on a major target of the enemy,” according to state media.

The Rodong Sinmun reported Monday that the test should serve as a “warning” to the U.S. and South Korea and accused Washington of “frantically escalating” tensions by bringing nuclear-capable weapons systems to the Korean Peninsula for ongoing joint exercises.

It said North Korea’s “nuclear attack” drills lasted two days, beginning with repeated “command and control” exercises on Saturday and a single missile test Sunday.

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