STS-71 (June 27 to July 7, 1995) was the first Space Shuttle mission to dock with the Russian Space Station Mir, and involved an exchange of crews (seven-member crew at launch, eight-member crew on return). The "Atlantis" Space Shuttle was modified to carry a docking system compatible with the Russian Mir Space Station. It also carried a Spacehab module in the payload bay in which the crew performed various life sciences experiments and data collections. STS-71 "Atlantis" launched from and returned to land at the Kennedy Space Center, Florida. Mission duration was 235 hours, 23 minutes.