Fortunately, this didn't happen to astronaut James S. Voss on May 21, who spent six hours preparing to fix and upgrade the International Space Station . Voss is shown above anchored in the clutches of Space Shuttle Atlantis ' mechanical arm , maneuvering outside the shuttle's cargo bay high above planet Earth . This space walk was the 85th in US history and the fifth dedicated to the construction of the International Space Station . The STS-101 mission returned early Monday morning after successfully replacing the station's batteries , lifting the station into a higher orbit, and replenishing needed supplies. In several years , when the International Space Station is complete, a crew of up to seven astronauts will live and work in a volume similar to a 747 jumbo jet .
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