PYONGYANG, North Korea • Defying U.N. warnings, North Korea on Tuesday conducted its third nuclear test in the remote, snowy northeast, taking a crucial step toward its goal of building a bomb small enough to be fitted on a missile capable of striking the United States.
North Korea said the atomic test was merely its "first response" to what it called U.S. threats, and said it will continue with unspecified "second and third measures of greater intensity" if Washington maintains its hostility.
Obama calls NKorea nuke test ‘highly provocative’
President Barack Obama on Tuesday called North Korea’s latest nuclear test a “highly provocative act” that threatens U.S. security and international peace.
“The danger posed by North Korea’s threatening activities warrants further swift and credible action by the international community,” Obama said in a statement issued early Tuesday. “The United States will also continue to take steps necessary to defend ourselves and our allies.”
North Korea said it successfully detonated a miniaturized nuclear device at a northeastern test site Tuesday. South Korean, U.S. and Japanese seismic monitoring agencies said they detected an earthquake in North Korea with a magnitude between 4.9 and 5.2.
North Korea’s official Korean Central News Agency said the test was conducted safely but with “great explosive power.” It said the test is aimed at coping with “ferocious” U.S. hostility that undermines the North’s peaceful, sovereign right to launch satellites.
“These provocations do not make North Korea more secure,” Obama said. “Far from achieving its stated goal of becoming a strong and prosperous nation, North Korea has instead increasingly isolated and impoverished its people through its ill-advised pursuit of weapons of mass destruction and their means of delivery.”
Defense Secretary Leon Panetta, in remarks Tuesday morning to Pentagon workers gathered in the building’s courtyard, said the U.S. is going to have to continue to deal with rogue states like North Korea.
The underground test, which set off powerful seismic waves, drew immediate condemnation from Washington, the U.N. and others. Even its only major ally, China, summoned the North’s ambassador for a dressing-down.
President Barack Obama, who was scheduled to give a State of the Union address later Tuesday, said nuclear tests "do not make North Korea more secure." Instead, North Korea has "increasingly isolated and impoverished its people through its ill-advised pursuit of weapons of mass destruction," he said in a statement.
North Korea claimed the device was smaller than in previous tests; Seoul said it likely produced a bigger explosion.
The test was a defiant response to U.N. orders to shut down atomic activity or face more sanctions and international isolation. It will likely draw more sanctions from the United States and other countries at a time when North Korea is trying to rebuild its moribund economy and expand its engagement with the outside world.
Several U.N. resolutions bar North Korea from conducting nuclear or missile tests because the U.N. Security Council considers Pyongyang a would-be proliferator of weapons of mass destruction and its nuclear testing a threat to international peace and stability. North Korea dismisses that as a double standard, and claims the right to build nuclear weapons as a defense against the United States, which has been seen as enemy No. 1 since the 1950-53 Korean War. The U.S. stations more than 28,000 troops in South Korea to protect its ally.
Tuesday’s test is North Korea’s first since young leader Kim Jong Un took power of a country long estranged from the West. The test will likely be portrayed in North Korea as a strong move to defend the nation against foreign aggression, particularly from the U.S.
"The test was conducted in a safe and perfect way on a high level, with the use of a smaller and light A-bomb, unlike the previous ones, yet with great explosive power," North Korea’s official Korean Central News Agency said, confirming speculation that seismic activity near Kilju around midday was a nuclear test.
North Korea was punished by more U.N. sanctions after a December launch of a rocket that the U.N. and Washington called a cover for a banned missile test. Pyongyang said it was a peaceful, and successful, bid to send a satellite into space.
The timing of the test is significant. It came hours before Obama’s speech and only days before the Saturday birthday of Kim Jong Un’s father, late leader Kim Jong Il, whose memory North Korean propaganda has repeatedly linked to the country’s nuclear ambitions.
This year also marks the 60th anniversary of the signing of the armistice that ended the 1950-53 Korean War, and in late February South Korean President-elect Park Geun-hye will be inaugurated.
In Pyongyang, where it was snowing Tuesday, North Koreans gathered around televisions to watch a 3 p.m. TV broadcast announcing the nuclear test.
The test shows the world that North Korea is a "nuclear weapons state that no one can irritate," Kim Mun Chol, a 42-year-old Pyongyang citizen, told The Associated Press in the North Korean capital. "Now we have nothing to be afraid of in the world."
The National Intelligence Service in Seoul told lawmakers that North Korea may conduct an additional nuclear test and test-launch a ballistic missile in response to U.N. talks about imposing more sanctions, according to the office of South Korean lawmaker Jung Chung-rae, who attended the private meeting. Analysts have also previously speculated that Pyongyang might conduct multiple tests, possibly of plutonium and uranium devices.
North Korea is estimated to have enough weaponized plutonium for four to eight bombs, according to American nuclear scientist Siegfried Hecker.
It wasn’t immediately clear to outside experts whether the device exploded Tuesday was small enough to fit on a missile, and whether it was fueled by plutonium or highly enriched uranium. A successful test would take North Korean scientists a step closer to building a nuclear warhead that can reach U.S. shores —seen as the ultimate goal of North Korea’s nuclear program.
In 2006, and 2009, North Korea is believed to have tested devices made of plutonium. But in 2010, Pyongyang revealed a program to enrich uranium, which would give the country a second source of bomb-making materials — a worrying development for the U.S. and its allies.
"This latest test and any further nuclear testing could provide North Korean scientists with additional information for nuclear warhead designs small enough to fit on top of its ballistic missiles," Daryl Kimball and Greg Thielmann wrote on the private Arms Control Association’s blog. "However, it is likely that additional testing would be needed for North Korea to field either a plutonium or enriched uranium weapon."
Uranium would be a worry because plutonium facilities are large and produce detectable radiation, making it easier for outsiders to find and monitor. However, uranium centrifuges can be hidden from satellites, drones and nuclear inspectors in caves, tunnels and other hard-to-reach places. Highly enriched uranium also is easier than plutonium to engineer into a weapon.
Monitoring stations in South Korea detected an earthquake in the North with a magnitude of 4.9 and the South’s Defense Ministry said that corresponds to an estimated explosive yield of 6-7 kilotons.Next Page >
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