Space Shuttle astronaut Mary Ellen Weber on the Space Shuttle Atlantis during mission STS-101. She is surrounded by spacesuits that will be used to perform extravehicular activity (EVA) at the International Space Station (ISS). STS-101 (19th- 29th May 2000) was the third mission to continue to assemble the ISS. The ISS is a collaboration between NASA, the European Space Agency, the Russian space agency, Canada, Japan and Brazil. It orbits at an altitude of 350 kilometres and will be over 100 metres in length. It is scheduled for completion in 2004.