 This encounter, and Oppenheimer's belated reporting of it, would later become one of the key issues in Oppenheimer's security hearings in front of the Atomic Energy Commission in 1954 which resulted in the revocation of his security clearance.Chevalier is interviewed in "The Day After Trinity" (1981), an Oscar-nominated documentary about Oppenheimer and the atomic bomb.After the House Subcommittee on Un-American Activities hearing, Chevalier lost his job at Berkeley in 1950 and was unable to find another professorship in the United States and thus moved to France, where he continued to work as a translator.