An anonymous reader writes "The New York Times reports on the life of George Koval, codenamed Delmar, one of the most important spies to have infiltrated the Manhattan Project, the secret program that created the world's first nuclear weapon. President Putin recently granted Koval a posthumous Hero of the Russian Federation award, the highest honorary title that can be given to a Russian citizen. Koval was born in Iowa, spoke fluent American English, and played baseball. But he was also recruited and trained by the GRU, Russia's largest intelligence agency."
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