Report: US assesses NKorea can fit nuke inside a missile

North Korea may have successfully produced a miniaturized nuclear warhead that can fit inside its missiles, passing a key threshold in becoming a full-fledged nuclear power, according to a Japanese defense paper and a U.S. media report.The U.N. Security Council this weekend slapped its toughest sanctions yet on North Korea over its latest test of a ballistic missile that could be used to deliver a nuclear weapon. Despite the rapid tempo of these tests, uncertainty has lingered over the isolated