North Korean leader Kim Jong Un ’s powerful sister yet again taunted South Korean efforts to improve ties, state media reported Wednesday, saying that her country will never accept Seoul as a diplomatic partner.

A California man has been sentenced to eight years in prison after admitting to shipping weapons and ammunition to North Korea that he said were to be used for a surprise attack on South Korea, authorities said Tuesday.

The intercontinental ballistic missiles likely to be housed at the military base “pose a potential nuclear threat to East Asia and the continental United States,” researchers said.