Do not reproduce without permission. Document 1: "Was Oppenheimer a Communist?" Chevalier to Oppenheimer, July 23, 1964, Robert Oppenheimer papers, Library of Congress Preparing his memoirs for publication, Haakon Chevalier notifies Oppenheimer that he plans to reveal that both were members of the same secret underground unit of the Communist Party's professional section from 1938 to 1942. Click here to go back. Content Copyright Gregg Herken 2023 Contact the author: gherken@brotherhoodofthebomb.com Please e-mail the author for questions or comments about the functionality of this site.