Igor Sutyagin is a Russian scientist who is known for his work in the field of weapons and military technology. In particular, he is recognized for his expertise on nuclear submarines and other aspects of the Russian military. Sutyagin gained international attention in 2004 when he was arrested by Russian authorities on charges of espionage for allegedly providing classified information to foreign intelligence services, including the United States. He was convicted and sentenced to 15 years in prison.
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