Space Shuttle Challenger disaster cause to the accident. After the accident, NASA attempted to aim at a more realistic shuttle flight rate: it added another orbiter, "Endeavour", to the space shuttle fleet to replace "Challenger", and it worked with the Department of Defense to put more satellites in orbit using expendable launch vehicles rather than the shuttle. In August 1986, President Reagan also announced that the shuttle would no longer carry commercial satellite payloads. After a 32-month hiatus, the next shuttle mission, STS-26, was launched on September 29, 1988. Although changes were made by NASA after the "Challenger" accident, many commentators have argued that
Space Shuttle Mission 2007 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 on January 1, 2008 after having been under development for more than six years. The main purpose of "Space Shuttle Mission 2007" is to allow the gamer to experience real historical NASA Space Shuttle missions from liftoff (T-00:01:50:00) to landing. Initially, "Space Shuttle Mission 2007" was released with a set of 11 missions but as time passed, the development team has been releasing new missions as free add-ons. The missions include satellite deployment and servicing (including