Kim vows North Korea's nukes are not on negotiation table

North Korean leader Kim Jong Un vowed Wednesday his nation will "demonstrate its mettle to the U.S." and never put its weapons programs up for negotiations, a day after test-launching its first intercontinental ballistic missile. The hard line suggests more tests are being prepared as the country tries to perfect nuclear-armed missiles capable of striking anywhere in the United States.Tuesday's ICBM launch, confirmed by U.S. and South Korean officials, is a milestone in North Korea's efforts to