02/03/09 1950 - Klaus Fuchs arrested for passing atomic bomb information to Soviets Klaus Fuchs, a German-born British scientist who helped developed the atomic bomb, is arrested in Great Britain for passing top-secret information about the bomb to the Soviet Union. The arrest of Fuchs led authorities to several other individuals involved in a spy ring, culminating with the arrest of Julius and Ethel Rosenberg and their subsequent execution.   On This Day Archives...