Ju Kyu-chang
Ju Kyu-chang (25 November 1928 – 3 September 2018) was a North Korean politician, who served as the director of the Workers' Party of Korea's (WPK) Machine-Building Industry Department. Ju was reportedly the head of North Korea's nuclear and missile programs. His background was in research and development, as opposed to his deputy director Hong Sung-mu, who is more manufacture-oriented. Ju was named to the Central Military Commission of the Workers' Party of Korea in 2010. Ju died in Pyongyang on 3 September 2018 from pancytopenia.