Pukguksong-1
The Pukguksong-1 or Pukkŭksŏng-1, Bukgeukseong-1 (, ), alternatively KN-11 in intelligence communities outside North Korea, is a North Korean, two-stage submarine-launched ballistic missile (SLBM) that was successfully flight tested on 24 August 2016. Pukguksong-1 is officially recognized by North Korea, South Korea and the United States as a missile that went through a complete, successful test on 24 August 2016. North Korea has never announced the actual operational range and payload, as this technical information is probably considered classified. Most countries do this: e.g., the United States considers the exact operational range of its current SLBM, UGM-133 Trident II, as classified information as well. Design In 2015, the missile was first launched with a liquid fuel motor, which was later replaced by a solid fuel motor. The earlier launches, conducted from a barge, did not feature grid fins, while the later submarine launched missiles did. The difference between the Pukguksong-1 and the Pukguksong-3 are the missile diameter, with the -1 being about 1.1 m in diameter, while the -3 is about 1.4 m, like the Pukguksong-2, as older model Pukguksong-3 also exist, with a similar pointed nose cone. Modified variant On 20 October 2021, North Korea launched a different version