After logging more than 20 hours in orbit, NASA's Hubble Space Telescope was about to be scrapped because repairs would prove too dangerous. This episode of "NOVA" follows the determination of the team that finally did fix this remarkable instrument. Follow the 12-day mission's five spacewalks by shuttle Atlantis astronauts, who explain the tough conditions they face in space, and witness the perilous work it took to restore the Hubble.
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