STS-79 was the first shuttle mission to a fully completed Mir space station, following the arrival of its Priroda module. Atlantis carried the 1,821-kilogram (4,015 lb) Orbiter Docking System. This spaceflight was highlighted by the collection of American astronaut Shannon Lucid after 188 days in space, the first American crewmember exchange aboard the Russian Space Station Mir, and the fourth Shuttle-Mir docking.[1] Lucid's long-duration spaceflight set a new American record, as well as worldwide spaceflight record for a woman astronaut.[2] She embarked to Mir 22 March on the STS-76 mission. Succeeding her on Mir for an approximately four-month stay was John Blaha, who returned in January 1997 with the STS-81 crew. American astronaut Jerry Linenger replaced him.