North Korean missiles getting more agile, evasive: experts

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In resuming its ballistic testing activity after a yearlong pause, North Korea has demonstrated a potentially nuclear-capable weapon that shows how it continues to expand its military capabilities amid a stalemate in diplomacy with the United States.

The two short-range missiles the North fired into the sea this week were its first meaningful provocation since the inauguration of President Joe Biden, who on Thursday delivered a restrained response to the launches, saying "there will be responses if they choose to escalate."

Since a provocative run in North Korean nuclear and missile tests in 2016 and 2017, much of the U.S. focus has been on North Korea’s intercontinental ballistic missiles that pose a direct threat to the American homeland.

But experts say North Korea’s growing arsenal of shorter-range solid-fuel weapons are more destabilizing for U.S. allies South Korea and Japan. And the latest launches underscored the North’s efforts to improve its capacities for delivering nuclear strikes and overwhelming missile defense systems.

People watch a TV showing an image of North Korea's new guided missile during a news program at the Suseo Railway Station in Seoul, South Korea, Friday. March 26, 2021. In resuming its ballistic testing activity after a yearlong pause, North Korea has demonstrated a potentially nuclear-capable weapon that shows how it continues to expand its military capabilities amid a stalemate in diplomacy with the United States. (AP Photo/Ahn Young-joon)

THE MISSILE

North Korea’s state media said Friday the weapons it fired a day earlier from its eastern coast were a new type of "tactical guided projectile" that borrowed the core technology of an earlier system.

According to the Korean Central News Agency, the new solid-fuel missiles, which are designed to be fired from land vehicles, could be armed with warheads weighing as much as 2.5 tons. During Thursday’s tests, the missiles demonstrated low-altitude, maneuverable flight and accurately hit a sea target 600 kilometers (372 miles) away.

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Analysts say the North likely tested an upgraded version of a system modeled after Russia’s Iskander mobile ballistic missiles. Their flatter trajectories compared to conventional ballistic weapons make them fly at an altitude where air is dense enough to allow for maneuverability. The unpredictability makes them harder to be intercepted by missile defense systems, experts say.

South Korea’s military took an unusually long time to release its assessment on the launches Thursday before it said hours later that the missiles traveled as far as 450 kilometers (279 miles).

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Kim Dong-yub, a professor from Seoul’s University of North Korean Studies, said the discrepancy between the South Korean and North Korean assessments possibly shows how difficult it is for radar systems to accurately track these missiles during flight.

"Even if our military got things wrong, it doesn’t matter for now as they could easily adjust their assessment after analyzing satellite data," said Kim, a former South Korean military official. "But how are you going to do that in times of war?"

This photo provided by the North Korean government, shows what it says a test fire of newly developed new-type tactical guided projectile by the Academy of Defense Science, at an undisclosed place in North Korea, Thursday, March 25, 2021. Independent journalists were not given access to cover the event depicted in this image distributed by the North Korean government. The content of this image is as provided and cannot be independently verified. Korean language watermark on image as provided by source reads: "KCNA" which is the abbreviation for Korean Central News Agency. (Korean Central News Agency/Korea News Service via AP)

THE WARHEAD

Whether missiles traveled 450 kilometers or 600 kilometers, that’s more than enough range to hit any corner of mainland South Korea. And experts say the North’s efforts to arm them with huge warheads indicate they are being designed for nuclear strikes.

The tests came after North Korean leader Kim Jong Un during a January ruling party congress vowed to bolster his nuclear deterrent in face of U.S.-led sanctions and pressure and issued a broad wish list of military hardware that included new tactical nuclear weapons.

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If North Korea successfully develops an operational system, these missiles will provide an ability to launch tactical nuclear attacks on military bases and other strategic targets in South Korea, said Yang Wook, a military expert who teaches at South Korea’s Hannam University.

"We have long said it would be difficult for North Korea to put nuclear warheads on (short-range) missiles if it fails to make them small and light enough," said Yang. But North Korea would no longer have to do so if its missiles could reliably deliver a warhead of 2.5 tons, which Yang said would be more than three times heavier than most warheads on existing North Korean missiles.

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Lee Choon Geun, a missile expert at South Korea’s Science and Technology Policy Institute, said the missiles would pose a huge threat for South Korea even if they are conventionally armed.

"A conventional warhead of 2.5 tons would be enough to bust deeply built bunkers," he said. "That capacity would also allow for something more powerful than tactical nuclear weapons, possibly thermonuclear devices."

This photo provided by the North Korean government, shows what it says a test fire of newly developed new-type tactical guided projectile by the Academy of Defense Science, at an undisclosed place in North Korea, Thursday, March 25, 2021. Independent journalists were not given access to cover the event depicted in this image distributed by the North Korean government. The content of this image is as provided and cannot be independently verified. Korean language watermark on image as provided by source reads: "KCNA" which is the abbreviation for Korean Central News Agency. (Korean Central News Agency/Korea News Service via AP)

MORE TESTING

North Korea has a history of testing new U.S. administrations with weapons demonstrations aimed at forcing the Americans back to the negotiating table.

Kim Jong Un so far has nothing to show for his ambitious summits with former President Donald Trump, which collapsed in 2019 over disagreements in exchanging the release of crippling U.S.-led sanctions against North Korea and the North’s disarmament steps.

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While Thursday’s launches were less provocative compared to the nuclear and ICBM tests in 2017 that inspired war fears before the North shifted toward diplomacy with the Trump administration in 2018, most experts say the North is likely to dial up its testing activities.

The North conducted more than a dozen short-range launches amid stalled diplomacy in 2019 and 2020 as Trump dismissed the tests despite the threat they posed to South Korea and Japan. The United States stations a total of 80,000 troops in the two Asian countries, the core of America’s military presence in the Asia-Pacific region.

"These missiles are no joke because it seems pretty clear they’re aiming to mount nuclear warheads," and evade missile defense systems, said Duyeon Kim, a senior analyst at the Washington-based Center for a New American Security.

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She said the nature of these missiles would require U.S. and South Korea to develop an effective response by returning to their normal scale and scope of joint military exercises, which have been downsized under the Trump administration to make room for diplomacy.