SEOUL — North Korean leader Kim Jong-un called on his scientists to do more to boost the country’s arsenal after the regime conducted its fourth nuclear test last week in defiance of neighbours including China and South Korea.
Speaking to the scientists responsible for building what North Korea said was a hydrogen bomb, Mr Kim said it was his "expectation and conviction" they would advance their research, the official Korean Central News Agency said Monday. Mr Kim has said the nuclear programme is defensive and designed to prevent a US-led invasion.
Mr Kim’s comments come as the US and South Korea seek international support to punish the isolated nation for the test and pressure it to halt its nuclear programme. The US on Sunday sent a B-52 bomber on a low-level flight south of Seoul, while South Korea has restarted propaganda broadcasts across its heavily armed northern border. The loudspeaker bursts risked pushing South Korea and North Korea "toward the brink of war", North Korean official Kim Ki Nam said on Friday, Yonhap reported.
"North Korea has every political and technical reason to test nuclear devices and missiles," said Duyeon Kim, a Seoul-based nonresident associate in the Nuclear Policy Programme and Asia Programme at the Carnegie Endowment for International Peace. "We know they will continue doing it, so the real question is what will we do about it."
North Korea launched a long-range rocket before each of its previous three nuclear tests, which resulted in a tightening of international sanctions. But trade bans on arms and luxury items have failed to convince it to return to disarmament talks that broke down in 2009, leading it to revive the production of nuclear devices.
North Korea said it tested its first hydrogen bomb on January 6, drawing skepticism from arms experts as the tremors were similar to those of the smaller, conventional atomic devices previously detonated. In the aftermath of the test, South Korea beefed up its defensive positions near sites where it set up loudspeakers blaring messages critical of North Korea along with K-pop music. The US deployed the B-52 with an escort of South Korean F-15 and US F-16 fighters, according to US Forces Korea.
No significant troop movements had been detected in North Korea that could signal an imminent provocation, and the US was in talks with South Korea about deploying more strategic assets to the peninsula, South Korean Defence Ministry spokesman Kim Min Seok said on Monday at a briefing.
"B-52 missions reinforce the US commitment to the security of our allies and partners, and demonstrate one of the many alliance capabilities available for the defence of the Republic of Korea," US Seventh Air Force commander, Lt-Gen Terrence O’Shaughnessy, said in an e-mailed statement from the United States Forces Korea (USFK).
The US and South Korea are struggling to get unity on a response from China, which is North Korea’s main ally. That could hinder efforts for stronger United Nations (UN) sanctions as South Korea seeks meetings with neighbouring nations to draw support for fresh UN action.
Chinese Foreign Minister Wang Yi told his South Korean counterpart Yun Byung Se by phone on Friday that efforts should be made to restart talks to end North Korea’s nuclear programme, according to a text message from South Korea’s foreign ministry.
US Secretary of State John Kerry on Thursday urged China to support a more aggressive approach with Pyongyang, saying its North Korea policy had been a failure.
In an editorial, China’s official Global Times newspaper blamed the "hostile policy" of the US toward North Korea for prompting the nuclear tests.
"China is not the cause and crux of the Korean nuclear issue, nor is it the key to resolving the problem," foreign ministry spokeswoman Hua Chunying said in Beijing on Friday. "Nevertheless, having in mind the international nuclear nonproliferation regime as well as peace and stability of northeast Asia, the Chinese side has been calling for and seeking proper settlement of different parties’ reasonable concerns and fundamental approach to enduring peace on the peninsula."
Still, the second nuclear test since Mr Kim came to power four years ago may have angered President Xi Jinping, who in October sent a high-ranking envoy to Pyongyang with a handwritten letter seeking deeper co-operation. North Korea, while accepting energy and food aid from China, has spurned Beijing’s efforts to drop its nuclear programme and return to talks.
China may be reluctant to crack down hard on North Korea for fear of destabilising the regime in case it sends millions of refugees across China’s border or leads to an eventual unification with the South, leaving a well-armed US ally on China’s frontier.
The potential for a collapse in North Korea is a bigger threat to South Korea than a direct military confrontation, Moody’s Investors Service analysts Shirin Mohammadi and Steffen Dyck said Monday.
"A regime collapse in North Korea would (be) likely (to) lead to a disorderly reunification on the peninsula, weighing on South Korea’s creditworthiness," they wrote. "The North Korean regime has survived for more than 65 years, but internal economic and political strains could eventually lead to a sudden collapse. Such a development is a risk that would pose enormous challenges for South Korea."