STS-110

The seven astronauts on the space shuttle Atlantis will conduct four spacewalks to install a massive exterior truss, a railcar and 43 feet (13 meters) of track to the international space station. The first space railroad will move the station's robotic arm during construction jobs and should stretch more than 360 feet (100 meters) when completed.

Click on the above tabs for the STS-110 timeline, background on the crews and to link to more information about the space program.