division at the institute and was allowed to apply his prodigious scientific skills to the problems of the day. His wife Elena, after receipt of a letter in Timofeev-Resovskij's hand, left Berlin in 1948, with their son Andrew, to join him in Sungul'. The house occupied by the three Timofeev-Resovskijs was every bit as nice as that planned for the German scientists working at the Sungul' institute. Nikolaus Riehl found out that Timofeev-Resovskij was in Sungul' and had vision problems brought on by the malnutrition he suffered in the GULAG. Riehl studied the effects of vitamins on vision and determined a course of treatment. He acquired the necessary vitamins and had Zavenyagin send them on to Timofeev-Resovskij, but the actions were to no avail, as the condition was not reversible. After the detonation of the Russian uranium bomb, uranium production was going smoothly and Riehl's oversight was no longer necessary at Plant No. 12. Riehl then went, in 1950, to head "Laboratory B", where he stayed until 1952. Laboratory B was responsible for the handling, treatment, and use of radioactive products generated in reactors, as well as radiation biology, dosimetry, and radiochemistry. Laboratory B, as a Sharashka and a facility in the Soviet atomic bomb project, was overseen by the 9th Chief Directorate of the NKVD (MVD after 1946). Laboratory B was known under another cover name as Объект 0211 (Ob’ekt 0211, Object 0211), as well as Object B. (In 1955, Laboratory B was closed. Some of its personnel were transferred elsewhere, but most of them were assimilated into a new, second nuclear weapons institute, Scientific Research Institute-1011 (NII-1011), today known as the Russian Federal Nuclear Center All-Russian Scientific Research Institute of Technical Physics, RFYaTs–VNIITF.) Timofeev-Resovskij headed the radiobiology department at Laboratory B, and another political prisoner from the Gulag, S. A. Voznesenskij, headed the radiochemistry department. In Timofeev-Resovskij's department, Born, Catsch, and Zimmer were able to conduct work similar to that which they had done in Germany, and all three became section heads in the department. Tsarapkin, Timofeev-Resovskij's long-time colleague was also at Laboratory B. Before being rejoined in the Soviet Union, Zimmer, Timofeev-Resovskij, and Riehl had collaborated on the biological effects of ionizing radiation. Also, Zimmer and Timofeev-Resovskij had put together a manuscript which was a comprehensive summary of their work and that of others on radiation-induced gene mutation and related areas; the book, Das Trefferprinzip in der