Sergei Treshchov
Sergei Yevgenyevich Treshchov (Сергей Евгеньевич Трещёв) (born 18 August 1958) is a former cosmonaut of the RSC Energia. He spent 184 days in space as a flight engineer of the International Space Station long duration Expedition 5 crew. During the mission Treshchov also conducted a spacewalk.
Read more about Sergei Treshchov: Personal, Education, Experience, Cosmonaut Career