Who Was Willi Frunze?

Follett invents a fictional German physicist named Wilhelm Frunze, loosely based on the historical Klaus Fuchs. Frunze gives Soviet spy Volodya Peshkov detailed plans for the "Fat Man" bomb, allowing the Soviets to build a similar bomb by 1949. Frunze and his wife are later found guilty of treason and executed.

Who was the Russian spy in the Manhattan Project?

Klaus Emil Julius Fuchs (29 December 1911 – 28 January 1988) was a German theoretical physicist and atomic spy who supplied information from the American, British, and Canadian Manhattan Project to the Soviet Union during and shortly after World War II.

Who were the Russian spies at Los Alamos?

Before this discovery, the three spies known for bringing atomic secrets to the Soviets from Los Alamos were David Greenglass, Klaus Fuchs and Theodore Hall.