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20th July 1950: Mugshots, one full-on and the other a profile view, of Julius Rosenberg, convicted in 1951 with his wife Ethel for spying and passing American atomic secrets to the Soviets. (Photo by Hulton Archive/Getty Images)

20th July 1950:  Mugshots, one full-on and the other a profile view, of Julius Rosenberg, convicted in 1951 with his wife Ethel for spying and passing American atomic secrets to the Soviets.  (Photo by Hulton Archive/Getty Images)

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UNITED STATES - JANUARY 01: Police photos in 1950 of Ethel ROSENBERG, wife of Julius ROSENBERG, the American engineer accused by Ethel's own brother of having given secrets about the atomic bomb to the Soviet Union. (Photo by Keystone-France/Gamma-Keystone via Getty Images)

UNITED STATES - JANUARY 01:  Police photos in 1950 of Ethel ROSENBERG, wife of Julius ROSENBERG, the American engineer accused by Ethel's own brother of having given secrets about the atomic bomb to the Soviet Union.  (Photo by Keystone-France/Gamma-Keystone via Getty Images)

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Julius and Ethel Rosenberg (nee Ethel Greenglass) in a Marshal's van en route to the Federal House of Detention, after they had been found guilty of nuclear espionage. They were subsequently executed. (Photo by Keystone/Getty Images)

Julius and Ethel Rosenberg (nee Ethel Greenglass) in a Marshal's van en route to the Federal House of Detention, after they had been found guilty of nuclear espionage. They were subsequently executed.  (Photo by Keystone/Getty Images)