Saturday July 22, 4:44 PM U.S. carefully watching possibility of N. Korea nuke test (Kyodo) _ The United States is vigilantly watching the possibility of North Korea conducting a nuclear test now that it has test-fired ballistic missiles, a senior U.S. administration official told Kyodo News on Friday. "I wouldn't rule it out," the official said, speaking on condition of anonymity, adding he is unaware of any indication from North Korea that it plans to test its nuclear weapons. Asked if the United States is exercising "vigilance" about a nuclear test, the official said, "Very absolutely." North Korea warned of...