Hwasong-5, North Korean version of the Scud ballistic missile
This process was accompanied by the construction of a missile-building infrastructure, of which the main elements were the 125 factory at Pyongyang, a research and development institute at Sanum-dong and the Musudan-ri Launch Facility.
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The range with a 1000 kilogram warhead was increased from 280 to 320 kilometres, and the Isayev engine was slightly modified.
Hwasong-6, also a North Korean version of the Scud ballistic missile