The Rosenbergs: Cold War Spies Executed for Atomic Espionage
How Julius and Ethel Rosenberg became the only American civilians executed for passing atomic secrets to the Soviet Union

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Quick Facts
Quick Facts
On June 19, 1953, Julius and Ethel Rosenberg walked to the electric chair at Sing Sing Correctional Facility, making them the only American civilians ever executed for espionage during the Cold War.
Julius Rosenberg, born May 12, 1918, and his wife Ethel (née Greenglass), born September 28, 1915, were members of the American Communist Party who became entangled in one of the era's most controversial spy cases. Their arrest came during the height of Cold War paranoia, with Julius detained on July 17, 1950, followed by Ethel's arrest roughly a month later.
The charges against them were serious: conspiracy to commit espionage under the U.S. Espionage Act of 1917. Federal prosecutors alleged that the couple had passed classified information about atomic bomb designs to the Soviet Union. The indictment also included accusations of espionage involving radar, sonar, and jet propulsion engine technology.
The trial began in early March 1951 and moved quickly, concluding within three weeks. Central to the government's case was David Greenglass, Ethel's own brother, who testified against the couple. Greenglass, himself an atomic spy, provided damaging testimony that sealed their fate. On March 29, 1951, the jury returned guilty verdicts. Just one week later, on April 5, 1951, the judge imposed the ultimate penalty: death sentences for both defendants.
The speed of their conviction and the severity of their punishment sparked immediate controversy. Civil rights groups, legal scholars, and international observers questioned aspects of the trial, though their appeals were ultimately exhausted. For two years, the Rosenbergs remained imprisoned while their legal team fought to overturn the verdicts.


