In 1941 , Rybkin moved to the Soviet embassy in Stockholm . He returned to the Soviet Union in Autumn 1943 . During World War II , he served as a chief under the NKGB in the Northern Caucasus . Rybkin was an agent at the Yalta Conference in 1945 . From February 1947 he served under the MGB
Yalta Conference
Yalta Conference
Boris Rybkin