anyone who thinks that the united states was ever under existential threat is paranoid. the united states has been a world superpower for all the years you list. the united states has been a premier nuclear power since 1945. not even during the cuban missile crisis would it be accurate to claim that the united states was under an existential threat. furthermore, the united states, like all other countries, has many military secrets. the divulgence of military secrets has always been considered a crime.
North Korea insists it 'regrets,' not apologizes, over mine blast that killed 2 South soldiers (AP)
from the article: Publish the truth, ask questions later