South Korean defense chief says North Korea appears to have made ‘some progress’ in hypersonic missile development

Solid-fuel missiles are known to be harder to detect ahead of launch compared with liquid-fuel ones that require more pre-launch preparations, such as the injection of fuel.

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File photo of Defense Minister Shin Won-sik. PHOTO; YONHAP/ THE KOREA HERALD

January 17, 2024

Solid-fuel missiles are known to be harder to detect ahead of launch compared with liquid-fuel ones that require more pre-launch preparations, such as the injection of fuel.

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