 Complete the following phrase:  Dolgikh was promoted to the rank of captain in November 1941, and appointed deputy head of the NKVD in Khabarovsk Krai. In 1945, he was appointed head of the NKVD in Khabarovsk Krai. He was head of Gulag in 1951-54. In May 1954, he led the commission which opened negotiations with prisoners at the Kengir labour camp, in Kazakhstan, who 