Hemingway tried to spy for the Soviets

New evidence examined in Spies: The Rise and Fall of the KGB in America (co-written by John Earl Haynes, Harvey Klehr, and Alexander Vassiliev) suggests that Nobel Prize winning American author Ernest Hemingway was an unsuccessful spy for the Soviet KGB in the 1940's.

According to The Guardian:

Its section on the author's secret life as a "dilettante spy" draws on his KGB file in saying he was recruited in 1941 before making a trip to China, given the cover name "Argo", and "repeatedly expressed his desire and willingness to help us" when he met Soviet agents in Havana and London in the 40s. However, he failed to "give us any political information" and was never "verified in practical work", so contacts with Argo had ceased by the end of the decade. Was he only ever a pseudo-spook, possibly seeing his clandestine dealings as potential literary material, or a genuine but hopelessly ineffective one?