George Abramovich Koval was an American born Jew, who became a Russian scientist and served the Soviet military intelligence, ‘Glavnoye Razvedyvatel'noye Upravleniye’ (GRU), as an agent during the ‘Second World War’. Though born in America, he spent significant period of his early adulthood in Soviet Union as his family moved there. He was appointed and trained by the ‘Main Intelligence Directorate’ of Soviet Union, who designated him with code name ‘Delmar’. After returning to the US he joined the American Army and was assigned at the atomic research labs. He passed on many research related classified information to the Soviet Union including volumes on different chemical elements like uranium, plutonium and polonium and their application in creating atomic ammunitions. The Soviet Union sources mentioned that his espionage in the ‘Manhattan Project’ "drastically reduced the amount of time it took for Russia to develop nuclear weapons”. He was posthumously conferred ‘Hero of the Russian Federation’ in 2007 by Russian President Vladimir Putin.