Kim Jong Un Brands South Korea Primary Foe and Rules out Unity

North Korean leader Kim Jong Un has said unification with the South is no longer possible and that the constitution should be changed to designate it the principal enemy.
Mr Kim also said three organisations dealing with reunification would shut down.
South Korea’s president said it would respond multiple times stronger to any provocation from the North.
The two Koreas have been divided since the Korean War ended in 1953 and did not sign a peace treaty and therefore have remained technically at war ever since.