What was the reason behind the revocation of Oppenheimer's security clearance in 1954?
Financial fraud
Espionage
Past associations with Communist-affiliated people and organizations
Criminal activity
Answer
During the Second Red Scare, J. Robert Oppenheimer's past associations with people and organizations affiliated with the Communist Party led to the revocation of his security clearance in 1954. This decision effectively stripped him of his direct political influence.
Mastermind of the Atomic Age: The J. Robert Oppenheimer Quiz