The Space Shuttle Discovery has made a safe landing at Kennedy Space Center despite losing a clip which had been attached to the rudder. On Friday, Discovery's astronauts spotted something floating away from their spaceship that turned out to be a small metal clip which broke off the spacecraft. But engineers decided within four hours that its absence posed no danger for re-entry. During the shuttle's mission, it installed a $1bn-Japanese-built laboratory, which is now the space station's biggest room and most sophisticated science workshop. A new pump was also delivered to fix the only toilet on board the ISS [BBC].
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