Lewis Strauss (Robert Downey Jr.) informed the physicist that his security clearance had been suspended due to his alleged ties to the Communist Party and urged Oppenheimer to quit. (Oppenheimer's ...

Robert Oppenheimer's name has become ... In 1953, at the height of U.S. anticommunist feeling, Oppenheimer was accused of having communist sympathies, and his security clearance was taken away.

Robert Oppenheimer as recipient ... But in 1955 the Atomic Commission cancelled Dr. Oppenheimer's security clearance after he was charged with flirting with Communism and associating with Communists.