News / Asia

No 'Smoking Gun' from Last Month's North Korea Nuclear Test

Screen grab shows North Korean leader Kim Jong-Un (C) pointing to a South Korean island during a trip to an artillery unit on Wolnae Island near the disputed maritime frontier with South Korea, March 12, 2012.
Screen grab shows North Korean leader Kim Jong-Un (C) pointing to a South Korean island during a trip to an artillery unit on Wolnae Island near the disputed maritime frontier with South Korea, March 12, 2012.
Reuters
A month after North Korea's nuclear test, a monitoring agency said on Tuesday it was highly unlikely to find any "smoking gun" radioactive traces from the blast, potentially leaving key questions about the device unresolved.

The lack of this kind of scientific evidence may make it difficult to determine what fissile material was used in the isolated Asian state's third nuclear test, which was detected by seismic monitors.

The Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO), which has a global network of monitoring stations designed to pick up radioactive traces emitted from tests, said it had yet to find any such signs.

"It is very unlikely that we will register anything at this point ... at this late stage," CTBTO spokeswoman Annika Thunborg said.

Thunborg did not give details, but the failure to detect radioactive traces could indicate that North Korea managed to prevent any such release from the Feb. 12 underground explosion.

The test-ban treaty was negotiated in the 1990s but has not taken effect because some holders of nuclear technology have not yet ratified it, including the United States and China.

But the organization already monitors possible breaches, deploying more than 270 stations worldwide to look out for signs of atomic tests, including seismic waves and radioactive traces.

It can take weeks to pick up radioactive so-called noble gases, depending on the weather.
        
"We are confident that the system works very well," Thunborg said. A senior CTBTO official last month said the "smoking gun" of any nuclear test would be the detection of radionuclide traces.

One critical question is what kind of fissile material North Korea used in the latest test. In 2006 and 2009, it is believed to have used plutonium as the fissile core.

North Korea abandoned plutonium production in 2007, following international pressure, but later acknowledged that it had built facilities to produce enriched uranium, which can also be used in bombs if refined to a high degree.

Without the trace evidence, however, U.S. and allied officials have said it would be very difficult for outsiders to determine whether the latest test involved a plutonium or uranium core.

North Korea's Leader Visits Coastal Detachment

  • North Korean leader Kim Jong Un visits the Wolnae Islet Defence Detachment in the western sector of the front line, which is near Baengnyeong Island of South Korea, March 11, 2013. (KCNA)
  • North Korean leader Kim Jong Un visits a long-range artillery sub-unit of the Korean People's Army Unit 641, March 11, 2013. (KCNA)
  • North Korean leader Kim Jong Un holds a guitar during his visit to a military unit on the Wolnae Islet Defence Detachment in the western sector of the front line, which is near Baengnyeong Island, South Korea, March 11, 2013. (KCNA)
  • North Korean leader Kim Jong Un waves while in a boat during his visit to the Wolnae Islet Defence Detachment in the western sector of the front line, which is near Baengnyeong Island of South Korea March 11, 2013. (KCNA)

You May Like

Photogallery Oxfam: Ebola Could Be 'Disaster of Our Generation'

Meanwhile, Fidel Castro, the former leader of Cuba, says the Caribbean island nation will 'gladly cooperate' with the US in the fight against Ebola in West Africa More

Multimedia Kobani Fighting Sends 400,000 Refugees to Turkey

Refugees receive help from Turkish authorities and individuals, but say much more is needed More

India’s Ruling Nationalist Party Makes Gains in Regional Elections

Bharatiya Janata Party’s huge margin over its rivals puts it on course to form governments in the northern Haryana and western Maharashtra states More

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Exclusive: American Joins Kurds' Anti-IS Fighti
X
Zana Omer
October 18, 2014 6:37 PM
The United States and other Western nations have expressed alarm about their citizens joining Islamic State forces in Syria and Iraq. In a rare counterpoint to the phenomenon, an American has taken up arms with the militants' Syrian Kurdish opponents. Elizabeth Arrott has more in this exclusive profile by VOA Kurdish reporter Zana Omer in Ras al Ayn, Syria.
Video

Video Exclusive: American Joins Kurds' Anti-IS Fight

The United States and other Western nations have expressed alarm about their citizens joining Islamic State forces in Syria and Iraq. In a rare counterpoint to the phenomenon, an American has taken up arms with the militants' Syrian Kurdish opponents. Elizabeth Arrott has more in this exclusive profile by VOA Kurdish reporter Zana Omer in Ras al Ayn, Syria.
Video

Video South Korea Confronts Violence Within Military Ranks

Every able-bodied South Korean male between 18 and 35 must serve for 21 to 36 months in the country’s armed forces, depending upon the specific branch. For many, service is a rite of passage to manhood. But there are growing concerns that bullying and violence come along with the tradition. Reporter Jason Strother has more from Seoul.
Video

Video Comanche People Maintain Pride in Their Heritage

The Comanche (Indian nation) once were called the “Lords of the Plains,” with an empire that included half the land area of current day Texas, large parts of Oklahoma, New Mexico, Kansas and Colorado.The fierceness and battle prowess of these warriors on horseback delayed the settlement of most of West Texas for four decades. VOA’s Greg Flakus reports from Lawton, Oklahoma, that while their warrior days are over, the 15,000 members of the Comanche Nation remain a proud people.
Video

Video Turkey Campus Attacks Raise Islamic Radicalization Fears

Concerns are growing in Turkey of Islamic radicalization at some universities, after clashes between supporters of the jihadist group Islamic State (IS) or ISIS, and those opposed to the extremists. Pro-jihadist literature is on sale openly on the streets of Istanbul. Critics accuse the government of turning a blind eye to radicalism at home, while Kurds accuse the president of supporting IS - a charge strongly denied. Henry Ridgwell reports from London.
Video

Video Syrian Defector Leaks Shocking Photos of Torture Victims

Shocking photographs purporting to show Syrian torture victims are on display at the U.S. Holocaust Memorial Museum in Washington. The museum says the graphic images are among thousands of photographs recently smuggled out of Syria by a military policeman-turned-defector. As VOA reporter Julie Taboh reports, the museum says the photos provide further evidence of atrocities committed by the government of Syrian President Bashar al-Assad against its own people.
Video

Video Drought-Stricken California Considers Upgrading Water System

A three-year drought in California is causing a water shortage that is being felt on farms and cities throughout the state. As VOA's Mike O’Sullivan reports, water experts, consumers and farmers say California needs to make changes to cope with an uncertain future.
Video

Video TechShop Puts High-tech Dreams Within Reach

Square, a business app and card reader, makes it possible to do credit card transactions through cell phones. But what made Square possible? VOA’s Adrianna Zhang and Enming Liu have the answer.
Video

Video Church for Atheists Goes Global

Atheists, by definition, do not believe in God. So they should have no need of a church. But two years ago, a pair of British stand-up comedians decided to create one. Sanderson Jones and Pippa Evans told the BBC they envisioned “something like church but without God". Their “Sunday Assembly” movement has grown from a single congregation in London to dozens of churches around the world. Reporter Mike Osborne visited with the members of a Sunday Assembly that now meets regularly in Nashville.
Video

Video Robot Locates Unexploded Underwater Mines

Many educators believe that hands-on experience is the best way to learn. Proving that the method works is a project developed by a group of students at the Stevens Institute of Technology, in Hoboken, New Jersey. They rose up to a challenge posted by the U.S. Department of Defense and successfully designed and built an underwater robot for locating submerged unexploded ordnance. VOA’s George Putic reports.
Video

Video Liberia's JFK Hospital Reopens After Temporary Ebola Exposure

JFK Hospital is Liberia’s largest and one of its oldest medical facilities. The hospital had to close temporarily following the deaths of two leading doctors from Ebola. It is now getting back on its feet, with the maternity ward being the first section to reopen. Benno Muchler has more for VOA News from Monrovia.
Video

Video Hong Kong Protests Expose Generation Gap

Most of the tens of thousands of protesters in Hong Kong are students seeking democracy. Idealistic youths say while the older generation worries about the present, they are fighting for the territory's future. VOA's Daniel Schearf reports from Hong Kong.
Video

Video Liberians Living in US Struggle From Afar as Ebola Ravages Homeland

More than 8,000 Liberians live in New York City, more than in any other city outside of Liberia itself. As VOA’s Bernard Shusman reports, with the Ebola virus ravaging their homeland, there is no peace of mind for these New Yorkers.
Video

Video Kurds See War-Ravaged Kobani As Political, Emotional Heartland

Intense fighting is continuing between Islamic State militants -- also known as ISIS or ISIL -- and Kurdish forces around the Syrian town of Kobani, on the Turkish border. The U.S. said it carried out at least nine airstrikes against Islamic State positions Friday. Meanwhile the U.N. has warned that hundreds of civilians would be massacred if the town falls to the militants. Henry Ridgwell looks at the strategic significance of the city.

All About America

AppleAndroid