Yury Onufrienko served Expedition 4 as commander and conducted two Russian spacewalks. He also served as commander aboard the Russian Space Station Mir during the Mir-21 mission in 1996.› Biography →
Carl Walz served as flight engineer for Expedition 4 and conducted two spacewalks. He previously served as a mission specialist for three space shuttle missions and visited the Russian Space Station Mir.› Biography →
Daniel Bursch served as a flight engineer for Expedition 4 and conducted two spacewalks. He served as a mission specialist on three previous space shuttle missions.› Biography →
Visit the Expedition 4 photo gallery.