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North Korea performs key test to build more advanced ICBM

North Korean leader Kim Jong-un has supervised the test of a “high-thrust solid-fuel motor” for a new strategic weapon, state media reported, a development that could allow him to possess a more mobile, harder-to-detect arsenal of intercontinental ballistic missiles that can reach the mainland US.

Thursday’s “static firing test” of a missile engine at the country’s northwest rocket launch facility was the first of its kind in North Korea, the official Korean Central News Agency reported. It said that the test provided “a sure sci-tech guarantee for the development of another new-type strategic weapon system.”

Kim praised scientists and technicians over the test, saying he expected the new weapon would be built “in the shortest span of time,” KCNA said.

North Korea is likely referring to a solid-fueled ICBM, which is among an array of high-tech weapons systems that Kim vowed to introduce during a major ruling Workers’ Party conference early last year. 

Other weapons systems Kim promised to manufacture include a multi-warhead missile, underwater-launched nuclear missiles and spy satellites.

The latest motor test showed that North Korea is determined to carry out Kim’s vows to develop such sophisticated weapons systems despite its pandemic-related domestic hardships and US-led international pressures to curb its nuclear program. 

READ MORE: North Korea issues nuclear threat after Kim oversees ICBM test with family

Barrage of missile tests

In recent months, North Korea has test-fired a barrage of nuclear-capable ballistic missiles including last month’s launch of its developmental, longest-range Hwasong-17 ICBM designed to carry multiple warheads. Some experts say North Korea would eventually use an expanded arsenal to seek sanctions relief and other concessions from the United States.

“We’d been expecting a test of this kind for a while. Large-diameter solid propellant rocket motors will enable North Korea to deploy larger submarine-launched missiles and, more importantly, more survivable and responsive intercontinental-range ballistic missiles,” said Ankit Panda, an expert with the Carnegie Endowment for International Peace.

“Unlike liquid propellant missiles, solid propellant missiles are fueled at the time of manufacture and can thus be released far more quickly in a war, all else being equal,” Panda said. “I wouldn’t be surprised if they’d look to do additional testing and development of these motors before moving to flight-testing.”

The fuel in solid-propellant rockets is already loaded inside, which helps to shorten launch preparation times, increase the weapon’s mobility and make it harder for outsiders to detect what’s happening before liftoff. North Korea already has a growing arsenal of short-range, solid-fueled ballistic missiles targeting key targets in South Korea, including US military bases there.

According to the KCNA report, Thursday’s test was to verify specific technical features of the high-thrust solid-fuel motor based on the thrust vector controlling technology. It said the test results showed all the technical indices proved its reliability and stability.

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