Cosmonaut who participated in two International Space Station missions and conducted three spacewalks.
He graduated from the Tambov Air Force Academy.
He served as Commander of International Space Station Expedition 17 and again visited the ISS during Expedition 28.
He and his wife Natalia welcomed a son in 2001. His father was fellow Russian cosmonaut Aleksandr Volkov.
He and Garrett Reisman served together on Expedition 17.