That BLIN was to help recruit and support the German resistance to Nazism in Berlin, from 1936 to 1938. Yet the authors admitted that Stone broke with the KGB after the Nazi–Soviet Pact of 1939, and speculate that later Soviet communications with Stone were meant to reactivate their previous relationship. As such, Klehr, Haynes, and Vassiliev conclude that: "The documentary record shows that I. F. Stone consciously cooperated with Soviet intelligence, from 1936 through 1938, Popular Front period. An effort was made, by Soviet intelligence, to reestablish that relationship in 1944–45; we do not know whether that effort succeeded. To put it plainly, from 1936 to 1939 I. F. Stone was a Soviet spy".