George Koval , born in Iowa to Belarusian immigrants, was recruited by Soviet military intelligence (GRU) while living in the USSR during the 1930s. Operating under the code name , he became the only Soviet spy known to have gained high-level security clearance at top-secret Manhattan Project sites like Oak Ridge and Dayton.

You can read more about George Koval's mission through the Atomic Heritage Foundation .

: Koval focused on the Urchin , the device responsible for initiating the nuclear chain reaction in the early atomic bombs.

: Unlike many other atomic spies, Koval was never caught while active. His role only became public knowledge in 2007 when he was posthumously awarded the title of Hero of the Russian Federation. The 7z File Context

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George Koval , born in Iowa to Belarusian immigrants, was recruited by Soviet military intelligence (GRU) while living in the USSR during the 1930s. Operating under the code name , he became the only Soviet spy known to have gained high-level security clearance at top-secret Manhattan Project sites like Oak Ridge and Dayton.

You can read more about George Koval's mission through the Atomic Heritage Foundation . EspionageUrchin.7z

: Koval focused on the Urchin , the device responsible for initiating the nuclear chain reaction in the early atomic bombs. George Koval , born in Iowa to Belarusian

: Unlike many other atomic spies, Koval was never caught while active. His role only became public knowledge in 2007 when he was posthumously awarded the title of Hero of the Russian Federation. The 7z File Context : Koval focused on the Urchin , the

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