Ethel Rosenberg

McCarthyism: The practice named after Senator Joseph McCarthy characterized by allegations without proof or based on slight evidence regarding disloyalty or subversion; often associated with anti-communist hysteria.

Red Scare: The fear that communists both outside and inside America were working to destroy American life, leading to a range of actions that had profound and enduring effects on U.S. government and society.

Venona Project: A counterintelligence program initiated by the United States Army's Signal Intelligence Service (later the National Security Agency) that discovered Julius and Ethel Rosenberg's espionage activities.