left-wing affiliations between 1938 and 1946, including his delayed and false reporting of the Chevalier incident to authorities. The twenty-fourth charge related to his opposition to the hydrogen bomb. By including the hydrogen bomb, the AEC changed the character of the hearing, by opening up an inquiry into his activities as a postwar government adviser. Oppenheimer testified for a total of 27 hours. His demeanor was very different from his previous interrogations, such as his appearance before the House Un-American Activities. Under cross-examination by Robb, who had access to top-secret information such as surveillance recordings, Oppenheimer was "often anguished, sometimes surprisingly inarticulate, frequently apologetic about his past and even self-castigating." One of the key elements in this hearing was Oppenheimer's earliest testimony about Eltenton's approach to various Los Alamos scientists, a story that Oppenheimer confessed he had fabricated to protect his friend Chevalier. Unknown to Oppenheimer, both versions were recorded during his interrogations of a decade before, and he was surprised on the witness stand with transcripts that he had no chance to review. Under questioning by Robb, he admitted that he had lied to Boris Pash, an Army counterintelligence officer, concerning the approach from Chevalier. Asked why he had fabricated a story that three people had been approached for espionage, Oppenheimer responded, "Because I was an idiot." Much of the questioning of Oppenheimer concerned his role in the hiring for Los Alamos of his former students Ross Lomanitz and Joseph Weinberg, both members of the Communist Party. The questions probed into Oppenheimer's private life, including his affair with Jean Tatlock, a Communist with whom he stayed the night while he was married. Lansdale had concluded at the time that his interest in Tatlock was romantic rather than political. Nonetheless, this innocuous affair may have played more heavily in the minds of the review panel. Groves, testifying as a witness for the AEC and against Oppenheimer, reaffirmed his decision to hire Oppenheimer. Groves said that Oppenheimer's refusal to report Chevalier was "the typical American school boy attitude that there is something wicked about telling on a friend." Under questioning from Robb, Groves said that under the security criteria in effect in 1954, he "would not clear Dr. Oppenheimer today." The official position of the Air Force was to support the suspension of the security clearance, which was given during testimony by its chief scientist, David T. Griggs. Although his testimony