NEW : U.S. and North Korean officials met in New York last month , a source says . The two sides agreed to hold talks on the North's nuclear program at an unspecified location this year or early next year. The U.S. believes test could occur without standard warning to aviation , shipping . 41 % of Americans see North Korea as an `` immediate threat , '' a new poll shows .
NEW : U.S. and North Korean officials met in New York last month , a source says . Recent intelligence shows North Korea likely has completed launch preparations . The U.S. believes test could occur without standard warning to aviation , shipping . 41 % of Americans see North Korea as an `` immediate threat , '' a new poll shows .