Fuchs walks free after nine years; the man who handed Moscow the implosion bomb flies to Dresden

By 1959, Klaus Fuchs had served nine years of a fourteen-year sentence — the maximum British law allowed for passing secrets to an ally. The German-born theoretical physicist had worked at the heart of the Manhattan Project, sitting in Hans Bethe's Theoretical Physics Division at Los Alamos while feeding implosion bomb designs to a Soviet courier named Harry Gold. British authorities released him that year, stripped of his citizenship, and he flew to Dresden, East Germany, where he resumed his scientific career and eventually joined the central committee of the Socialist Unity Party…