Had Roosevelt died a year earlier, the vice president who would have succeeded him would have been Henry Wallace (and not Harry Truman). In preparation for this eventuality, Henry Wallace had already selected his Secretary of State (Larry Druggan) and Secretary of the Treasury (Harry Dexter White). Both were spies in the pay of the KGB, codenamed Frank and Jurist, respectively. The revelation was made by the Venona program, with which the American NSA intercepted and decrypted more than 3,000 Soviet messages. Venona was only declassified in 1995. Venona also allowed the unmasking of Donald Maclean (codenamed Homer), one of the “Magnificent Five” recruited by the KGB in the 1930s. Maclean then led to the other four, including John Cairncross, the Fifth Man, who worked at Bletchey Park alongside Turing in 1942-43, at the turning point on the Eastern Front.
