A file containing a report by the Joint Scientific and Joint Technical Intelligence Committees concerning weapons development in the Soviet Union, circulated in December 1946. Subjects covered in the report include the state of scientific research in the U.S.S.R.; Soviet use of German scientists; the future composition of the Soviet air force; the level of Soviet radar development; Soviet development of ground-to-ground, ground-to-air, and air-to-ground missiles based on German models; future Soviet progress in biological and chemical weapons production; and estimates of the U.S.S.R.'s potential for stockpiling fissionable materials and producing atomic weapons by 1951.