The NKVD was responsible for the construction and maintenance of highways. The labor for infrastructure projects came from the corrective labor camps, or [[concentration camps|GULAG]]s.<ref>Joseph A. Michela, Military Attache Moscow Report 1903, "N.K.V.D. of the U.S.S.R.," 14 April 1941, [[Franklin D. Roosevelt]] Library, [[Harry Hopkins]] Papers, "MID Reports--USSR--Volume V," box 190. [https://www.cia.gov/library/center-for-the-study-of-intelligence/csi-publications/books-and-monographs/venona-soviet-espionage-and-the-american-response-1939-1957/5c.gif p.4].</ref> | The NKVD was responsible for the construction and maintenance of highways. The labor for infrastructure projects came from the corrective labor camps, or [[concentration camps|GULAG]]s.<ref>Joseph A. Michela, Military Attache Moscow Report 1903, "N.K.V.D. of the U.S.S.R.," 14 April 1941, [[Franklin D. Roosevelt]] Library, [[Harry Hopkins]] Papers, "MID Reports--USSR--Volume V," box 190. [https://www.cia.gov/library/center-for-the-study-of-intelligence/csi-publications/books-and-monographs/venona-soviet-espionage-and-the-american-response-1939-1957/5c.gif p.4].</ref> |