Columbia will serve as a valuable research tool.
For safety's sake, NASA selects a new Return to Flight vehicle and launch date.
Go behind the scenes at Kennedy Space Center as Shuttle Discovery gets an overhaul.
› Part 2: Into the OrbiterRescue teams were put to the test during a mock Shuttle disaster.
› View this Video →Events Honor Fallen Astronauts
› View Video →Veteran astronaut talks about Return to Flight, missions to Mars and what's next for NASA
› View Interview Video →The fallen crew of Space Shuttle Columbia now has an enduring memorial on Mars.
› View this Video →Astronauts serve as Shuttle crew's eyes and ears
Busy days ahead at the KSC Space Station Processing Facility.
Michael Foale has spent more time in space than any other U.S. astronaut.
Four NASA astronauts have been chosen to fly on the newly-created Space Shuttle mission, STS-121.
An unusual-looking test measures vibrations in Shuttle launch platform and flight hardware.
› View this Video →Efforts to return the Space Shuttle to flight are under way at Johnson Space Center in Houston, Texas and at other NASA centers.
› View JSC Video →At Kennedy Space Center over $3 million in digital analysis equipment has been recently added.
Robert Crippen will be a guest on this special webcast highlighting Shuttle Columbia.
Researchers thrilled that several experiments survived Columbia accident.
Columbia recovery efforts in East Texas required a cast of thousands
NASA identifies critical activities to ensure safe flight.
› View Task Force