North Korea plans nuclear test, U.S. calls it threat
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North Korea said on Tuesday it would conduct its first nuclear test, and Washington warned it would respond to such an "unacceptable threat" to world peace.
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The White House warned that a North Korean nuclear test would be an &quot;incendiary&quot; event threatening Pyongyang's neighbors, but it refused to comment on the possible timing of the test.
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North Korea appeared close Sunday to test-firing a long-range missile capable of reaching the United States, prompting the White House to warn of an appropriate response and Japan to threaten a &quot;fierce&quot; protest to the United Nations.
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North Korea has accused the United States of threatening war by carrying out a test of its missile defense system and conducting joint military exercises with the South.
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A nuclear test by North Korea could encourage Japan, Taiwan and possibly South Korea to initiate their own nuclear programs in the already unsettled region, according to a report by Republican staff on the House Intelligence Committee.
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U.S. Ambassador John Bolton urged the U.N. Security Council on Tuesday to respond to North Korea's threat to conduct a nuclear test, saying it would be a grave threat to international peace and security.
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North Korea could flight test at any  time a ballistic missile potentially capable of reaching parts  of the United States with a nuclear-weapon-sized payload, the  State Department's top arms control official said on Friday.
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The United States and Japan warned  North Korea on Monday against a missile launch as some  officials said Pyongyang appeared to have finished fueling for  a test flight that could reach as far as Alaska.
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North Korea has test-fired &quot;several missiles&quot;, the United States confirmed Wednesday, as UN inspectors prepared to visit a reactor at the centre of the reclusive regime&#39;s nuclear programme.
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The United States does not believe North Korea has conducted nuclear tests, but it is unclear whether a reported blast there three days ago showed
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North Korea will respond to a pre-emptive U.S. military attack with an &quot;annihilating strike and a nuclear war,&quot; the state-run media said Monday, heightening its antagonistic rhetoric.
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The US says will not accept a nuclear-armed North Korea after Pyongyang announces test plans.
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North Korea lashed out at the United States over its plans to build a missile defense shield Tuesday but did not directly address concerns that it is preparing to test-fire a missile capable of reaching the United States.
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North Korea triggered global alarm on Tuesday by saying it will conduct a nuclear test, a key step in the manufacture of atomic bombs that it views as a deterrent against any U.S. attack. But the North also said it was committed to nuclear disarmament, suggesting a willingness to negotiate.
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Washington says North Korea would be reckless to carry out a nuclear test, and is raising the issue at the UN.
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Tensions mounted over North Korea's threat to test its first atomic bomb, with shots ringing out Saturday along the border with South Korea and Japan warning of harsh sanctions if Pyongyang goes nuclear.
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North Korea is to conduct a nuclear test, the foreign ministry says in a statement.