Page 53 - Curriculum Visions Dynamic Book

The Russian docking compartment (called Pirs) was added in September 2001.
In 2002 the second part of the 11-piece integrated truss structure was delivered and attached to the station.
Meanwhile, NASA continued its flight tests of the X-38, a demonstrator for the crew return vehicle, which would be the ISS lifeboat.
In this way, by adding to the station piece by piece,
the ISS changed from being a concept on a drawing board to a reality.
Living quarters and crew
One of the big challenges facing science and technology
is how to allow for continuous occupancy in space. The Space Shuttle and Mir have already laid the foundation for this, but ISS crew rotations every 6 months will ensure that no lasting damage is done to people until science is better equipped to understand the effects on the human body of long-term space travel.
truss Tubing arrayed in the form of triangles and designed to make a strong frame.
 A guitar shows that there is an opportunity for more home comforts even if the room available is still small.
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