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North Korea's Big Move: A New Submarine in the Works

South Korea, SeoulThursday, December 25, 2025
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Recent state media photos reveal North Korea's progress in constructing an 8,700-ton-class nuclear-powered submarine, a key component of its naval modernization strategy. Leader Kim Jong Un has emphasized the submarine's importance in bolstering the country's nuclear deterrent.

Kim Inspects Submarine Construction

Kim recently visited a shipyard to oversee the submarine's development. State media displayed a large, burgundy-colored vessel under construction, indicating that core components such as the engine and reactor are already installed. Analysts speculate that the submarine could undergo sea trials within months.

Kim Criticizes South Korea's Nuclear Submarine Plans

Kim criticized South Korea's efforts to acquire its own nuclear-powered submarine, labeling it a threat to North Korea's security. He asserted that completing his submarine would significantly enhance North Korea's nuclear war deterrent.

Challenges and International Relations

Building a nuclear-powered submarine is a complex endeavor, particularly for North Korea, which faces stringent sanctions and economic hardships. However, experts suggest that North Korea's recent alignment with Russia may have facilitated access to critical technologies.

South Korea's Nuclear Submarine Ambitions

South Korea is also pursuing nuclear-powered submarines, with support from the United States. President Donald Trump has indicated the U.S. is open to sharing the technology. However, details about the submarine's construction location, nuclear fuel, and reactor technology remain unclear.

Other Developments

In related news, Kim supervised a test of a new long-range anti-air missile. South Korea's Defense Ministry has not commented on the launch.

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