STS-71 "Atlantis" (June 27-July 7, 1995) launched from the Kennedy Space Center with a seven-member crew and returned there with an eight-member crew. STS-71 was the first Space Shuttle mission to dock with the Russian Space Station Mir, and involved an exchange of crews. The "Atlantis" Space Shuttle was modified to carry a docking system compatible with the Russian Mir Space Station. It also carried a Spacelab module in the payload bay in which the crew performed various life sciences experiments and data collections. Mission accomplished in 153 orbits of the Earth, traveling 4.1 million miles in 235 hours and 23 minutes.