Space Shuttle Discovery is bathed in evening light after removal of the rotating service structure at Launch Pad 39B.
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STS-121 mission crew land at Kennedy Space Center to prepare for launch day.
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The crew of STS-121 visited Kennedy Space Center for three final days of training in preparation for a July liftoff.
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Crew rehearses countdown before launch.
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Discovery made its slow but steady journey to the launch pad.
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The STS-121 payloads are packed up and delivered to the launch pad.
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The space shuttle rests on launch pad 39B at NASA's Kennedy Space Center, Fla.
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Discovery joins its boosters and tank in the Vehicle Assembly Building.
David Fraine discusses going to sea for NASA.
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Solid rocket boosters are retrieved at sea so they can be used again in launching shuttles.
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Shuttle Engineer Bill McQuade discusses his work and his deployment to Baghdad.
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STS-1 crew members Young and Crippen share memories of the first space shuttle mission.
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External tank 119 rolls into the Vehicle Assembly Building.
Solid rocket booster stacking for STS-121 is underway at Kennedy Space Center.
NASA's twin crawler transporters celebrate 40 years on the job.
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Space Shuttle Endeavour is fully powered for the first time in nearly two years.
What does it take to carry an orbiter across the country on a 747?
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NASA's Return to Flight mission was filled with firsts.
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Discovery returns home to Kennedy after a deorbit landing at Edwards Air Force Base.
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Discovery, riding piggy-back on the 747 makes a picture-perfect landing at Kennedy.
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