North Korea tested new tactical ballistic missiles using super-large warheads and modified cruise missiles on Wednesday led by leader Kim Jong Un, who called for stronger conventional weapons and nuclear capabilities,

In a national day speech marking the 76th founding anniversary for his government, Kim Jong Un said North Korea faces "a grave threat" because of what he called "the reckless expansion" of a U.S.-led regional military bloc that is now developing into a nuclear-based one.