 Edwards flew on STS-89 (January 22–31, 1998), the eighth Shuttle-Mir docking mission, during which the crew transferred more than of scientific equipment, logistical hardware and water from to Mir.In the fifth and last exchange of a U.S. astronaut, STS-89 delivered Andy Thomas to Mir and returned with David Wolf.Mission duration was 8 days, 19 hours and 47 seconds, traveling 3.6 million miles (5.8 million km) in 138 orbits of the Earth.