"It is self-defence rights" to retaliate against any move that threatens its sovereignty

North Korea warns of retaliation against US-South Korea military drills 

Washington said last week that the joint aerial exercise planned for next month would be reduced in scope from previous drills 

Analysts say North Korea appears to have been emboldened to toughen its approach by the impeachment inquiry into Trump in Washington Reuters Reuters Published: 3:13am, 14 Nov, 2019

相変わらずだな。