Space Shuttle design process refurbishment, and the agency studied resupplying the satellite in space. The Air Force planned on having its own fleet of shuttles, and re-built a separate launch facility originally derived from the canceled Manned Orbiting Laboratory program at Vandenberg called Space Launch Complex Six (SLC-6). However, for various reasons, due in large part to the loss of the space shuttle "Challenger" on January 28, 1986, work on SLC-6 was eventually discontinued with no shuttle launches from that location ever taking place. SLC-6 was eventually used for launching the Lockheed Martin-built Athena expendable launch vehicles, which included the successful IKONOS commercial Earth
Space Shuttle Mission 2007 Space Shuttle guiding the user through the mission. Extra-vehicular activities are conducted in first-person view allowing the user to experience the same feeling as astronauts do while "space walking". In certain missions, the virtual astronauts will also drive the Manned Maneuvering Unit to capture satellites for maintenance. The latest mission add-on is the STS-47 Spacelab mission. In this mission, the user can visit the Spacelab-J and float inside the lab in Zero-G just like real astronauts. Space Shuttle Mission 2007 Space Shuttle Mission 2007, is a highly realistic Space Shuttle stand-alone mission simulator for Microsoft Windows. The simulator was released