The United States urged North Korea on Saturday not to "aggravate tensions" as it slammed Pyongyang's latest missile test, apparently timed for the US Independence Day holiday, as "not helpful." "North Korea should refrain from actions that aggravate tensions and focus on denuclearization talks and the implementation of its commitments from the September 19, 2005 joint statement," said State Department spokesman Karl Duckworth. "This type of North Korean behavior is not helpful," he told AFP after North Korea test-fired seven missiles off its east coast earlier Saturday, according to ...