Russian Cosmonaut Sergei Volkov

jsc2015e032662 (02/06/2015) — Official crew photograph of Russian cosmonaut Sergei Volkov (Roscosmos), Flight Engineer with the International Space Station’s Expedition 45. Volkov also serves as the backup for Mikhail Kornienko, Russia’s One-Year Crew member. Credit: (Roscosmos/GCTC)