Atlantis (OV-104) was NASA's fourth space shuttle, completing a total of 32 missions from 1985 to 2011, including significant launches such as the deployment of the Magellan and Galileo probes. It played a crucial role in the Shuttle-Mir and International Space Station missions, docking multiple times with both. The final mission, STS-135, is scheduled for June 28, 2011, marking the end of the Space Shuttle program.